{"schema":"threatline.record/2","record":{"id":"CVE-2026-20353","aliases":[],"summary":"Cisco Secure Email Gateway Security Hardening Release","details":"As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Email Gateway and Cisco Secure Email and Web Manager engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.\r\n\r\nThe vulnerabilities tracked by CVE-2026-20353 are related to issues with improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.","categories":["Network & edge"],"product":"Cisco Secure Email","vendor":"Cisco","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-20353","source_modified_at":"2026-09-15T17:03:57.940Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Cisco Secure Email","vendor":"Cisco","versions":[{"version":"14.0.0-698","status":"affected"},{"version":"13.5.1-277","status":"affected"},{"version":"13.0.0-392","status":"affected"},{"version":"14.2.0-620","status":"affected"},{"version":"13.0.5-007","status":"affected"},{"version":"13.5.4-038","status":"affected"},{"version":"14.2.1-020","status":"affected"},{"version":"14.3.0-032","status":"affected"},{"version":"15.0.0-104","status":"affected"},{"version":"15.0.1-030","status":"affected"},{"version":"15.5.0-048","status":"affected"},{"version":"15.5.1-055","status":"affected"},{"version":"15.5.2-018","status":"affected"},{"version":"16.0.0-050","status":"affected"},{"version":"15.0.3-002","status":"affected"},{"version":"16.0.0-054","status":"affected"},{"version":"15.5.3-022","status":"affected"},{"version":"16.0.1-017","status":"affected"},{"version":"15.5.4-012","status":"affected"},{"version":"16.0.4-016","status":"affected"},{"version":"15.0.5-016","status":"affected"},{"version":"16.0.2-112","status":"affected"},{"version":"16.0.3-044","status":"affected"}],"defaultStatus":"unknown"}],"fixed_versions":[],"cvss":9.8,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00396,"percentile":0.32661,"score_date":"2026-10-23"},"published_at":"2026-09-14T16:08:50.062Z","modified_at":"2026-09-15T17:03:57.940Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-20353","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-09-15T17:03:57.940Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-20353","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-esa-dfCrfXkm"},{"source":"CVE List","url":"https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"total","assessed_at":"2026-09-14T00:00:00+00:00"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-09-15T17:03:57.940Z","content_hash":"2e923b7ff196c2ffa71274fa33fb3ea6f2790a341a02faef9a74d1d7775e26f7"}}