{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T11:02:33Z","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-zbfw-pP9jfzwL","slug":"cisco-sa-zbfw-pp9jfzwl","vendor":"Cisco","title":"Cisco IOS XE Software Zone-Based Policy Firewall ICMP and UDP Inspection Vulnerability","summary":"A vulnerability in the Zone-Based Policy Firewall feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent the Zone-Based Policy Firewall from correctly classifying traffic. This vulnerability exists because ICMP and UDP responder-to-initiator flows are not inspected when the Zone-Based Policy Firewall has either Unified Threat Defense (UTD) or Application Quality of Experience (AppQoE) configured. An attacker could exploit this vulnerability by attempting to send UDP or ICMP flows through the network. A successful exploit could allow the attacker to inject traffic through the Zone-Based Policy Firewall, resulting in traffic being dropped because it is incorrectly classified or in incorrect reporting figures being produced by high-speed logging (HSL). 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-zbfw-pP9jfzwL This advisory is part of the September 2021 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2021 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication.","severity":"Medium","published_at":"2021-09-22T16:00:00Z","updated_at":"2021-09-22T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL/csaf/cisco-sa-zbfw-pP9jfzwL.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":9,"public_evidence_count":9,"kev_count":0,"highest_epss":0.00913},"cves":[{"id":"CVE-2021-1625","kev":false,"epss":{"score":0.00913,"percentile":0.56157,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"}}],"public_evidence":[{"product":{"name":"Cisco IOS XE Software","slug":"cisco-ios-xe-software","vendor":"Cisco"},"cve":{"id":"CVE-2021-1625"},"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":"2026-07-20T00:54:11Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"16.10.1a; 16.10.1b; 16.10.1e; 16.10.1s; 16.11.1; 16.11.1c; 16.11.1s; 16.11.2; 16.12.1; 16.12.1a; 16.12.1c; 16.12.1s; 16.12.1y; 16.12.1z; 16.12.1z1; 16.12.1z2; 16.12.2; 16.12.2s; 16.12.2t; 16.12.3s; 16.2.1; 16.2.2; 16.3.1; 16.3.10; 16.3.11; 16.3.1a; 16.3.2; 16.3.4; 16.3.5; 16.3.6; 16.3.7; 16.3.8; 16.3.9; 16.4.1; 16.4.2; 16.4.3; 16.5.1; 16.5.1b; 16.5.2; 16.5.3; 16.6.1; 16.6.2; 16.6.3; 16.6.4; 16.6.4s; 16.6.5; 16.6.6; 16.6.7; 16.6.8; 16.6.9; 16.7.1; 16.7.2; 16.7.3; 16.8.1; 16.8.1a; 16.8.1c; 16.8.1s; 16.8.2; 16.8.3; 16.9.1a; 16.9.1s; 16.9.2s; 16.9.3s; 16.9.5; 16.9.6; 16.9.7; 17.1.1; 17.1.1s; 17.1.1t; 17.1.2; 17.1.3; 17.2.1; 17.2.1r; 17.2.1v; 17.2.2; 17.3.1; 17.3.1a; 17.3.1w; 17.3.1x; 17.3.1z; 17.3.2; 17.4.1; 17.4.1a; 3.16.0S; 3.16.0cS; 3.16.10S; 3.16.1aS; 3.16.2S; 3.16.3S; 3.16.4aS; 3.16.4bS; 3.16.4cS; 3.16.4dS; 3.16.4eS; 3.16.4gS; 3.16.5S; 3.16.5aS; 3.16.5bS; 3.16.6S; 3.16.6bS; 3.16.7S; 3.16.7aS; 3.16.7bS; 3.16.8S; 3.16.9S; 3.17.0S; 3.17.1S; 3.17.2S; 3.17.3S; 3.17.4S; 3.18.2aSP","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":0.00913,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-09-22T16:00:00Z","updated_at":"2021-09-22T16:00:00Z","advisory_updated_at":"2021-09-22T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL"},"row_display_order":1},{"product":{"name":"Cisco Adaptive Security Appliance (ASA) Software","slug":"cisco-adaptive-security-appliance-asa-software","vendor":"Cisco"},"cve":{"id":"CVE-2021-1625"},"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":"2026-07-20T00:54:11Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"16.3.3","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":0.00913,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-09-22T16:00:00Z","updated_at":"2021-09-22T16:00:00Z","advisory_updated_at":"2021-09-22T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL"},"row_display_order":2},{"product":{"name":"Cisco IOS XE Catalyst SD-WAN","slug":"cisco-ios-xe-catalyst-sd-wan","vendor":"Cisco"},"cve":{"id":"CVE-2021-1625"},"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":"2026-07-20T00:54:11Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"16.10.1; 16.10.2; 16.10.3; 16.11.1a; 16.11.1b; 16.12.3; 16.12.4; 16.12.4a; 16.12.5; 16.9.1; 16.9.2; 16.9.3; 16.9.4","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":0.00913,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-09-22T16:00:00Z","updated_at":"2021-09-22T16:00:00Z","advisory_updated_at":"2021-09-22T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL"},"row_display_order":3},{"product":{"name":"Cisco 1000 Series Integrated Services Routers","slug":"cisco-1000-series-integrated-services-routers","vendor":"Cisco"},"cve":{"id":"CVE-2021-1625"},"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":"2026-07-20T00:54:11Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco IOS XE Catalyst SD-WAN 16.10.1 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.2 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.3 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.3a when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.3b when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.4 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.5 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.6 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.11.1a when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.11.1b when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.1 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.2 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.3 when installed on Cisco 1000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.4 when installed on Cisco 1000 Series Integrated Services Routers","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":0.00913,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-09-22T16:00:00Z","updated_at":"2021-09-22T16:00:00Z","advisory_updated_at":"2021-09-22T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL"},"row_display_order":4},{"product":{"name":"Cisco ASR 1000 Series Aggregation Services Routers","slug":"cisco-asr-1000-series-aggregation-services-routers","vendor":"Cisco"},"cve":{"id":"CVE-2021-1625"},"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":"2026-07-20T00:54:11Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco IOS XE Catalyst SD-WAN 16.10.1 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.2 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.3 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.3a when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.3b when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.4 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.5 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.6 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.11.1a when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.11.1b when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.1 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.2 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.3 when installed on Cisco ASR 1000 Series Aggregation Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.4 when installed on Cisco ASR 1000 Series Aggregation Services Routers","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":0.00913,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-09-22T16:00:00Z","updated_at":"2021-09-22T16:00:00Z","advisory_updated_at":"2021-09-22T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL"},"row_display_order":5},{"product":{"name":"Cisco 4000 Series Integrated Services Routers","slug":"cisco-4000-series-integrated-services-routers","vendor":"Cisco"},"cve":{"id":"CVE-2021-1625"},"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":"2026-07-20T00:54:11Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco IOS XE Catalyst SD-WAN 16.10.1 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.2 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.3 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.3a when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.3b when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.4 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.5 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.10.6 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.11.1a when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.11.1b when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.11.1f when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.4a when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.1 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.2 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.3 when installed on Cisco 4000 Series Integrated Services Routers; Cisco IOS XE Catalyst SD-WAN 16.9.4 when installed on Cisco 4000 Series Integrated Services Routers","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":0.00913,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-09-22T16:00:00Z","updated_at":"2021-09-22T16:00:00Z","advisory_updated_at":"2021-09-22T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL"},"row_display_order":6},{"product":{"name":"Cisco Integrated Services Virtual Router","slug":"cisco-integrated-services-virtual-router","vendor":"Cisco"},"cve":{"id":"CVE-2021-1625"},"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":"2026-07-20T00:54:11Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco IOS XE Catalyst SD-WAN 16.10.1 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.10.2 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.10.3 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.10.3a when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.10.3b when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.10.4 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.10.5 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.10.6 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.11.1a when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.11.1b when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.12.4a when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.9.1 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.9.2 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.9.3 when installed on Cisco Integrated Services Virtual Router; Cisco IOS XE Catalyst SD-WAN 16.9.4 when installed on Cisco Integrated Services Virtual Router","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":0.00913,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-09-22T16:00:00Z","updated_at":"2021-09-22T16:00:00Z","advisory_updated_at":"2021-09-22T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL"},"row_display_order":7},{"product":{"name":"Cisco Cloud Services Router 1000V Series","slug":"cisco-cloud-services-router-1000v-series","vendor":"Cisco"},"cve":{"id":"CVE-2021-1625"},"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":"2026-07-20T00:54:11Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco IOS XE Catalyst SD-WAN 16.10.3a when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.10.3b when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.10.4 when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.10.5 when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.10.6 when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.11.1a when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.11.1b when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.12.4a when installed on Cisco Cloud Services Router 1000V Series; Cisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco Cloud Services Router 1000V 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":0.00913,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-09-22T16:00:00Z","updated_at":"2021-09-22T16:00:00Z","advisory_updated_at":"2021-09-22T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL"},"row_display_order":8},{"product":{"name":"Cisco Catalyst IR1100 Rugged Series Routers","slug":"cisco-catalyst-ir1100-rugged-series-routers","vendor":"Cisco"},"cve":{"id":"CVE-2021-1625"},"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":"2026-07-20T00:54:11Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco Catalyst IR1100 Rugged Series Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco Catalyst IR1100 Rugged Series Routers; Cisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco Catalyst IR1100 Rugged Series Routers; Cisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco Catalyst IR1100 Rugged Series Routers; Cisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco Catalyst IR1100 Rugged Series Routers; Cisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco Catalyst IR1100 Rugged Series Routers; Cisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco Catalyst IR1100 Rugged Series Routers","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":0.00913,"score_date":"2026-07-20","updated_at":"2026-07-21T05:16:34Z"},"published_at":"2021-09-22T16:00:00Z","updated_at":"2021-09-22T16:00:00Z","advisory_updated_at":"2021-09-22T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-pP9jfzwL"},"row_display_order":9}]}