{"schema_version":"public-product-v1.1","generated_at":"2026-07-21T10:41:19Z","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-fmc-dos-3WymYWKh","slug":"cisco-sa-fmc-dos-3wymywkh","vendor":"Cisco","title":"Cisco Firepower Management Center Software Denial of Service Vulnerability","summary":"A vulnerability in the host input API daemon of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper certificate validation. An attacker could exploit this vulnerability by sending a crafted data stream to the host input daemon of the affected device. A successful exploit could allow the attacker to cause the host input daemon to restart. The attacker could use repeated attacks to cause the daemon to continuously reload, creating a DoS condition for the API. Cisco has released software updates to 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-fmc-dos-3WymYWKh","severity":"Medium","published_at":"2020-10-21T16:00:00Z","updated_at":"2020-10-21T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-dos-3WymYWKh","csaf_url":"https://sec.cloudapps.cisco.com/security/center/contentjson/CiscoSecurityAdvisory/cisco-sa-fmc-dos-3WymYWKh/csaf/cisco-sa-fmc-dos-3WymYWKh.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":1,"public_evidence_count":1,"kev_count":0,"highest_epss":0.00729},"cves":[{"id":"CVE-2020-3557","kev":false,"epss":{"score":0.00729,"percentile":0.50118,"score_date":"2026-07-19","updated_at":"2026-07-20T05:46:48Z"}}],"public_evidence":[{"product":{"name":"Cisco Secure Firewall Management Center (FMC) Appliances","slug":"cisco-secure-firewall-management-center-fmc-appliances","vendor":"Cisco"},"cve":{"id":"CVE-2020-3557"},"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":"2026-07-20T04:48:18Z","csaf_status":"known_affected","csaf_product_status":"known_affected","csaf_product_status_path":"vulnerabilities[].product_status.known_affected","raw_product_name":"Cisco Secure Firewall Management Center (FMC) 6.2.3.1 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.2.3.10 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.2.3.12 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.2.3.13 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.2.3.3 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.2.3.5 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.2.3.8 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.2.3.9 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.4.0 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.4.0.1 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.4.0.3 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.4.0.5 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.4.0.6 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.4.0.7 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.6.0 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.6.0.1 when installed on Cisco Secure Firewall Management Center (FMC) Appliances; Cisco Secure Firewall Management Center (FMC) 6.6.1 when installed on Cisco Secure Firewall Management Center (FMC) Appliances","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":0.00729,"score_date":"2026-07-19","updated_at":"2026-07-20T05:46:48Z"},"published_at":"2020-10-21T16:00:00Z","updated_at":"2020-10-21T16:00:00Z","advisory_updated_at":"2020-10-21T16:00:00Z","source_url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-dos-3WymYWKh","remediation":{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-dos-3WymYWKh"},"row_display_order":1}]}