{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T11:05:34Z","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","advisory":{"id":"cisco-sa-asa-ftd-dos-JxYWMJyL","slug":"cisco-sa-asa-ftd-dos-jxywmjyl","vendor":"Cisco","title":"Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability","summary":"A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability. This vulnerability is due to incorrect handling of certain TCP segments when the affected device is operating in transparent mode. An attacker could exploit this vulnerability by sending a crafted TCP segment through an affected device. A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL This advisory is part of the October 2021 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication.","severity":"High","published_at":"2021-10-27T16:00:00Z","updated_at":"2021-10-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL/csaf/cisco-sa-asa-ftd-dos-JxYWMJyL.json","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure."},"freshness":{"last_source_refreshed_at":"2026-07-21T05:16:34Z","latest_source_refresh_at":"2026-07-21T05:16:34Z","oldest_source_refresh_at":"2026-07-21T03:00:03Z","all_sources_fresh":true,"sources":[{"source":"cisco_advisories","label":"Cisco advisories","last_success_at":"2026-07-21T03:00:03Z","stale":false},{"source":"cisco_csaf","label":"Cisco CSAF","last_success_at":"2026-07-21T05:14:24Z","stale":false},{"source":"nvd_cves","label":"NVD CVEs","last_success_at":"2026-07-21T05:16:30Z","stale":false},{"source":"cisa_kev","label":"CISA KEV","last_success_at":"2026-07-21T05:16:31Z","stale":false},{"source":"first_epss","label":"EPSS","last_success_at":"2026-07-21T05:16:34Z","stale":false}]},"summary":{"cve_count":1,"visible_product_count":8,"public_evidence_count":8,"kev_count":0,"highest_epss":0.00649},"cves":[{"id":"CVE-2021-34793","kev":false,"epss":{"score":0.00649,"percentile":0.4704,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"}}],"public_evidence":[{"product":{"name":"Cisco ASA 5500-X Series Firewalls","slug":"cisco-asa-5500-x-series-firewalls","vendor":"Cisco"},"cve":{"id":"CVE-2021-34793"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T04:46:26Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.1 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.4 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.9 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.12 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.2 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.7 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.9 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.10 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.13 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.18 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.2 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.24 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.29 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.4 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.7 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.10 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.15 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.19 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.30 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.13 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.4 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.8 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.1 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.9 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1.5 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1.7 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.14 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.15 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.17 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.20 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.24 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.26 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.28 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.33 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.35 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.38 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.8 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.11 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.14 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.16 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.18 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.21 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.26 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.29 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.8 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.10 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.12 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.15 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.17 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.20 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.22 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.25 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.26 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.29 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.3 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.32 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.33 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.34 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.35 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.39 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.7 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.8 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.1 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.10 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.11 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.12 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.13 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.14 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.15 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.16 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.17 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.2 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.3 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.4 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.5 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.6 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.7 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.8 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.9 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.1 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.10 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.11 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.12 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.2 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.3 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.4 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.5 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.6 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.7 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.8 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.9 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0.1 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.1 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.3 when installed on Cisco ASA 5500-X Series Firewalls; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.4 when installed on Cisco ASA 5500-X Series Firewalls","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00649,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-10-27T16:00:00Z","updated_at":"2021-10-27T16:00:00Z","advisory_updated_at":"2021-10-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL"},"row_display_order":1},{"product":{"name":"Cisco 3000 Series Industrial Security Appliances (ISA)","slug":"cisco-3000-series-industrial-security-appliances-isa","vendor":"Cisco"},"cve":{"id":"CVE-2021-34793"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T04:46:26Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.1 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.4 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.9 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.12 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.2 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.7 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.9 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.10 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.13 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.18 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.2 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.24 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.29 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.4 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.7 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.10 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.15 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.19 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.30 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.13 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.4 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.8 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.1 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.9 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1.5 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1.7 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.14 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.15 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.17 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.20 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.24 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.26 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.28 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.33 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.35 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.38 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.8 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.11 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.14 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.16 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.18 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.21 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.26 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.29 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.8 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.10 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.12 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.15 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.17 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.20 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.22 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.25 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.26 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.29 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.32 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.33 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.34 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.35 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.39 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.7 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.8 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.1 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.10 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.11 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.12 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.13 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.14 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.15 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.16 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.17 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.2 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.4 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.5 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.6 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.7 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.8 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.9 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.1 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.10 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.11 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.12 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.2 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.4 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.5 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.6 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.7 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.8 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.9 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0.1 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.6.1 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.6.3 when installed on Cisco 3000 Series Industrial Security Appliances (ISA); Cisco Secure Firewall Threat Defense (FTD) Software 6.6.4 when installed on Cisco 3000 Series Industrial Security Appliances (ISA)","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00649,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-10-27T16:00:00Z","updated_at":"2021-10-27T16:00:00Z","advisory_updated_at":"2021-10-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL"},"row_display_order":2},{"product":{"name":"Cisco Firepower 9000 Series","slug":"cisco-firepower-9000-series","vendor":"Cisco"},"cve":{"id":"CVE-2021-34793"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T04:46:26Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.1 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.4 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.9 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.12 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.2 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.7 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.9 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.10 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.13 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.18 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.2 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.24 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.29 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.4 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.7 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.10 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.15 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.19 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.30 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.13 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.4 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.8 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.1 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.9 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1.5 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1.7 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.14 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.15 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.17 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.20 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.24 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.26 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.28 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.33 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.35 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.38 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.8 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.11 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.14 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.16 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.18 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.21 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.26 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.29 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.8 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.10 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.12 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.15 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.17 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.20 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.22 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.25 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.26 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.29 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.3 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.32 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.34 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.35 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.39 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.7 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.8 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.1 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.10 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.11 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.12 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.13 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.14 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.15 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.16 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.17 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.2 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.3 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.4 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.5 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.6 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.8 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.9 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.1 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.10 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.11 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.12 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.2 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.3 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.4 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.5 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.6 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.7 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.8 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.9 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0.1 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.1 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.3 when installed on Cisco Firepower 9000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.4 when installed on Cisco Firepower 9000 Series","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00649,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-10-27T16:00:00Z","updated_at":"2021-10-27T16:00:00Z","advisory_updated_at":"2021-10-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL"},"row_display_order":3},{"product":{"name":"Cisco Firepower 4100 Series","slug":"cisco-firepower-4100-series","vendor":"Cisco"},"cve":{"id":"CVE-2021-34793"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T04:46:26Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.1 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.4 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.9 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.12 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.2 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.7 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.9 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.10 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.13 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.18 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.2 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.24 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.29 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.4 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.7 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.10 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.15 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.19 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.30 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.13 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.4 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.8 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.1 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.9 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1.5 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1.7 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.14 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.15 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.17 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.20 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.24 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.26 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.28 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.33 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.35 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.38 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.8 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.11 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.14 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.16 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.18 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.21 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.26 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.29 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.8 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.10 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.12 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.15 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.17 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.20 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.22 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.25 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.26 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.29 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.3 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.32 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.34 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.35 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.39 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.7 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.8 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.1 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.10 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.11 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.12 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.13 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.14 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.15 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.16 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.17 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.2 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.3 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.4 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.5 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.6 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.8 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.9 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.1 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.10 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.11 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.12 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.2 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.3 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.4 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.5 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.6 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.7 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.8 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.9 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0.1 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.1 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.3 when installed on Cisco Firepower 4100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.4 when installed on Cisco Firepower 4100 Series","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00649,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-10-27T16:00:00Z","updated_at":"2021-10-27T16:00:00Z","advisory_updated_at":"2021-10-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL"},"row_display_order":4},{"product":{"name":"Cisco Adaptive Security Virtual Appliance (ASAv)","slug":"cisco-adaptive-security-virtual-appliance-asav","vendor":"Cisco"},"cve":{"id":"CVE-2021-34793"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T04:46:26Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.1 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.4 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.9 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.12 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.2 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.7 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.9 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.10 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.13 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.18 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.2 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.24 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.29 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.4 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.7 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.10 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.15 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.19 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.30 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.6 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.13 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.4 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.8 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.1 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.9 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1.5 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.1.7 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.14 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.15 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.17 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.20 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.24 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.26 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.28 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.33 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.35 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.38 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.8 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.11 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.14 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.16 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.18 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.21 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.26 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.29 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.8 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.10 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.12 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.15 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.17 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.20 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.22 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.25 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.26 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.29 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.3 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.32 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.34 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.35 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.39 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.7 when installed on Cisco Adaptive Security Virtual Appliance (ASAv); Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.8 when installed on Cisco Adaptive Security Virtual Appliance (ASAv)","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00649,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-10-27T16:00:00Z","updated_at":"2021-10-27T16:00:00Z","advisory_updated_at":"2021-10-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL"},"row_display_order":5},{"product":{"name":"Cisco Firepower 2100 Series","slug":"cisco-firepower-2100-series","vendor":"Cisco"},"cve":{"id":"CVE-2021-34793"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T04:46:26Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.1 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.9 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.12 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.2 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.7 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.9 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.10 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.13 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.18 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.2 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.24 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.29 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.4 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.7 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.8 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.10 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.15 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.19 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.30 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.13 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.4 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.8 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.1 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.9 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.14 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.15 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.17 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.24 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.26 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.28 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.33 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.35 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.38 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.2.8 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.11 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.14 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.16 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.18 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.21 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.26 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.29 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.3.8 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.10 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.12 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.15 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.17 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.20 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.22 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.25 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.26 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.29 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.3 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.32 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.34 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.35 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.39 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.7 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8.4.8 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.1 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.10 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.11 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.12 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.13 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.14 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.15 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.16 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.17 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.2 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.3 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.4 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.5 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.6 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.7 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.8 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.9 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.1 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.10 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.11 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.12 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.2 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.3 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.4 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.5 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.6 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.7 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.8 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.9 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0.1 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.1 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.3 when installed on Cisco Firepower 2100 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.4 when installed on Cisco Firepower 2100 Series","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00649,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-10-27T16:00:00Z","updated_at":"2021-10-27T16:00:00Z","advisory_updated_at":"2021-10-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL"},"row_display_order":6},{"product":{"name":"Cisco Firepower 1000 Series","slug":"cisco-firepower-1000-series","vendor":"Cisco"},"cve":{"id":"CVE-2021-34793"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T04:46:26Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.10 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.15 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.19 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.1.30 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.13 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.4 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.2.8 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.1 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14.3.9 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.10 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.11 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.12 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.2 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.3 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.4 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.5 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.6 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.7 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.8 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.9 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0.1 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.1 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.3 when installed on Cisco Firepower 1000 Series; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.4 when installed on Cisco Firepower 1000 Series","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00649,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-10-27T16:00:00Z","updated_at":"2021-10-27T16:00:00Z","advisory_updated_at":"2021-10-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL"},"row_display_order":7},{"product":{"name":"Cisco Secure Firewall Threat Defense Virtual","slug":"cisco-secure-firewall-threat-defense-virtual","vendor":"Cisco"},"cve":{"id":"CVE-2021-34793"},"evidence_type":"structured_affected","evidence_label":{"scope":"CSAF product evidence","label":"product_status known affected"},"evidence_source":"Cisco CSAF","source":"Cisco CSAF","source_document_fetched_at":"2026-07-20T04:46:26Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.1 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.10 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.11 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.12 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.13 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.14 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.15 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.16 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.17 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.2 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.3 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.4 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.5 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.6 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.7 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.8 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.2.3.9 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.1 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.10 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.11 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.12 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.2 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.3 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.4 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.5 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.6 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.7 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.8 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.4.0.9 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0.1 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.1 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.3 when installed on Cisco Secure Firewall Threat Defense Virtual; Cisco Secure Firewall Threat Defense (FTD) Software 6.6.4 when installed on Cisco Secure Firewall Threat Defense Virtual","exposure_verdict":"not_assessed","verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","exposure_verdict_reason":"Public evidence does not evaluate exact release, platform, enabled features, configuration, compensating controls, or live exposure.","kev":false,"epss":{"score":0.00649,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-10-27T16:00:00Z","updated_at":"2021-10-27T16:00:00Z","advisory_updated_at":"2021-10-27T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL"},"row_display_order":8}]}