{"schema":"threatline.record/2","record":{"id":"CVE-2026-20179","aliases":[],"summary":"Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerabilities","details":"Multiple Cisco products are affected by a vulnerability in the Snort 3 Generic Routing Encapsulation (GRE) Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.\r\n\r\nThis vulnerability is due to incomplete error checking when Snort 3 parses GRE packets. An attacker could exploit this vulnerability by sending a crafted GRE packet to a targeted device to be parsed by Snort. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition.","categories":["Network & edge"],"product":"Cisco Open Source Snort3","vendor":"Cisco","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-20179","source_modified_at":"2026-10-22T19:11:03.271Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Cisco Open Source Snort3","vendor":"Cisco","versions":[{"version":"3.12.2.0","status":"affected"},{"version":"3.1.2.0","status":"affected"},{"version":"3.1.3.0","status":"affected"},{"version":"3.1.4.0","status":"affected"},{"version":"3.1.5.0","status":"affected"},{"version":"3.1.6.0","status":"affected"},{"version":"3.1.7.0","status":"affected"},{"version":"3.1.8.0","status":"affected"},{"version":"3.1.9.0","status":"affected"},{"version":"3.1.10.0","status":"affected"},{"version":"3.1.12.0","status":"affected"},{"version":"3.1.13.0","status":"affected"},{"version":"3.1.14.0","status":"affected"},{"version":"3.1.15.0","status":"affected"},{"version":"3.1.16.0","status":"affected"},{"version":"3.1.17.0","status":"affected"},{"version":"3.1.18.0","status":"affected"},{"version":"3.1.19.0","status":"affected"},{"version":"3.1.20.0","status":"affected"},{"version":"3.1.21.0","status":"affected"},{"version":"3.1.22.0","status":"affected"},{"version":"3.1.23.0","status":"affected"},{"version":"3.1.24.0","status":"affected"},{"version":"3.1.25.0","status":"affected"},{"version":"3.1.27.0","status":"affected"},{"version":"3.1.28.0","status":"affected"},{"version":"3.1.29.0","status":"affected"},{"version":"3.1.30.0","status":"affected"},{"version":"3.1.31.0","status":"affected"},{"version":"3.1.32.0","status":"affected"}],"defaultStatus":"unknown"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-20179","source_modified_at":"2026-10-22T19:11:03.271Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Cisco Secure Firewall Threat Defense (FTD) Software","vendor":"Cisco","versions":[{"version":"7.0.0","status":"affected"},{"version":"7.0.0.1","status":"affected"},{"version":"7.0.1","status":"affected"},{"version":"7.0.1.1","status":"affected"},{"version":"7.0.2","status":"affected"},{"version":"7.2.0","status":"affected"},{"version":"7.0.2.1","status":"affected"},{"version":"7.0.3","status":"affected"},{"version":"7.2.0.1","status":"affected"},{"version":"7.0.4","status":"affected"},{"version":"7.2.1","status":"affected"},{"version":"7.0.5","status":"affected"},{"version":"7.3.0","status":"affected"},{"version":"7.2.2","status":"affected"},{"version":"7.2.3","status":"affected"},{"version":"7.3.1","status":"affected"},{"version":"7.2.4","status":"affected"},{"version":"7.0.6","status":"affected"},{"version":"7.2.5","status":"affected"},{"version":"7.2.4.1","status":"affected"},{"version":"7.3.1.1","status":"affected"},{"version":"7.4.0","status":"affected"},{"version":"7.0.6.1","status":"affected"},{"version":"7.2.5.1","status":"affected"},{"version":"7.4.1","status":"affected"},{"version":"7.2.6","status":"affected"},{"version":"7.0.6.2","status":"affected"},{"version":"7.4.1.1","status":"affected"},{"version":"7.2.7","status":"affected"},{"version":"7.2.5.2","status":"affected"}],"defaultStatus":"unknown"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-20179","source_modified_at":"2026-10-22T19:11:03.271Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Cisco UTD SNORT IPS Engine Software","vendor":"Cisco","versions":[{"version":"17.12.1a","status":"affected"},{"version":"17.12.2","status":"affected"},{"version":"17.13.1a","status":"affected"},{"version":"17.12.3","status":"affected"},{"version":"17.14.1a","status":"affected"},{"version":"17.12.4","status":"affected"},{"version":"17.12.3a","status":"affected"},{"version":"17.15.1a","status":"affected"},{"version":"17.16.1a","status":"affected"},{"version":"17.12.4a","status":"affected"},{"version":"17.15.2c","status":"affected"},{"version":"17.12.4b","status":"affected"},{"version":"17.15.2a","status":"affected"},{"version":"17.12.5","status":"affected"},{"version":"17.17.1","status":"affected"},{"version":"17.12.5a","status":"affected"},{"version":"17.15.3a","status":"affected"},{"version":"17.15.3","status":"affected"},{"version":"17.12.5b","status":"affected"},{"version":"17.12.5c","status":"affected"},{"version":"17.15.4","status":"affected"},{"version":"17.18.1","status":"affected"},{"version":"17.18.1a","status":"affected"},{"version":"17.12.6","status":"affected"},{"version":"17.15.4c","status":"affected"},{"version":"17.12.5d","status":"affected"},{"version":"17.18.2","status":"affected"},{"version":"26.1.1","status":"affected"},{"version":"17.15.5","status":"affected"},{"version":"17.15.5a","status":"affected"}],"defaultStatus":"unknown"}],"fixed_versions":[],"cvss":5.8,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.0039,"percentile":0.319,"score_date":"2026-10-23"},"published_at":"2026-10-21T16:12:29.897Z","modified_at":"2026-10-22T19:11:03.271Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-20179","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-22T19:11:03.271Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-20179","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-snort3-misc-dos-6mB22qAK"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-21T17:21:03.985190Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-22T19:11:03.271Z","content_hash":"78a6d5e29acfdafc85a2c48e67590c2934d35b0383ab7a639b537857575000ea"}}