{"id":"CVE-2026-20065","state":"PUBLISHED","title":"Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability","description":"Multiple Cisco products are affected by a vulnerability in the Snort 3 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 an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly.","publishedAt":"2026-03-04T17:48:49.615Z","updatedAt":"2026-03-04T20:50:05.611Z","severity":{"score":5.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","source":"cisco"},"assigner":"cisco","products":["Cisco Cisco Secure Firewall Threat Defense (FTD) Software","Cisco Cisco UTD SNORT IPS Engine Software"],"affected":[{"vendor":"Cisco","product":"Cisco Secure Firewall Threat Defense (FTD) Software","defaultStatus":"unknown","versions":[{"version":"7.0.0","status":"affected"},{"version":"7.0.0.1","status":"affected"},{"version":"7.0.1","status":"affected"},{"version":"7.1.0","status":"affected"},{"version":"7.0.1.1","status":"affected"},{"version":"7.1.0.1","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":"7.1.0.2","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":"7.1.0.3","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"},{"version":"7.3.1.2","status":"affected"},{"version":"7.2.8","status":"affected"},{"version":"7.6.0","status":"affected"},{"version":"7.4.2","status":"affected"},{"version":"7.2.8.1","status":"affected"},{"version":"7.0.6.3","status":"affected"},{"version":"7.4.2.1","status":"affected"},{"version":"7.2.9","status":"affected"},{"version":"7.0.7","status":"affected"},{"version":"7.4.2.2","status":"affected"},{"version":"7.2.10","status":"affected"},{"version":"7.4.2.3","status":"affected"},{"version":"7.0.8","status":"affected"},{"version":"7.0.8.1","status":"affected"},{"version":"7.4.2.4","status":"affected"},{"version":"7.2.10.2","status":"affected"}]},{"vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","defaultStatus":"unknown","versions":[{"version":"17.3.1a","status":"affected"},{"version":"17.2.1r","status":"affected"},{"version":"17.3.2","status":"affected"},{"version":"17.4.1a","status":"affected"},{"version":"17.5.1","status":"affected"},{"version":"17.3.3","status":"affected"},{"version":"17.5.1a","status":"affected"},{"version":"17.3.4","status":"affected"},{"version":"17.3.4a","status":"affected"},{"version":"17.4.2","status":"affected"},{"version":"17.4.1b","status":"affected"},{"version":"17.6.1a","status":"affected"},{"version":"17.7.1a","status":"affected"},{"version":"17.6.2","status":"affected"},{"version":"17.8.1a","status":"affected"},{"version":"17.3.5","status":"affected"},{"version":"17.6.3","status":"affected"},{"version":"17.6.3a","status":"affected"},{"version":"17.7.2","status":"affected"},{"version":"17.9.1a","status":"affected"},{"version":"17.6.4","status":"affected"},{"version":"17.10.1a","status":"affected"},{"version":"17.3.6","status":"affected"},{"version":"17.3.7","status":"affected"},{"version":"17.9.2a","status":"affected"},{"version":"17.6.5","status":"affected"},{"version":"17.11.1a","status":"affected"},{"version":"17.9.3a","status":"affected"},{"version":"17.12.1a","status":"affected"},{"version":"17.9.4","status":"affected"},{"version":"17.6.6","status":"affected"},{"version":"17.3.8","status":"affected"},{"version":"17.3.8a","status":"affected"},{"version":"17.6.6a","status":"affected"},{"version":"17.9.4a","status":"affected"},{"version":"17.12.2","status":"affected"},{"version":"17.13.1a","status":"affected"},{"version":"17.9.5a","status":"affected"},{"version":"17.12.3","status":"affected"},{"version":"17.6.7","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":"17.6.8","status":"affected"},{"version":"17.9.6","status":"affected"},{"version":"17.6.8a","status":"affected"},{"version":"17.16.1a","status":"affected"},{"version":"17.9.5e","status":"affected"},{"version":"17.12.4a","status":"affected"},{"version":"17.15.2c","status":"affected"},{"version":"17.9.5f","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":"17.9.7a","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":"17.9.7b","status":"affected"},{"version":"17.18.1","status":"affected"},{"version":"17.18.1a","status":"affected"},{"version":"17.12.6","status":"affected"},{"version":"17.9.8","status":"affected"},{"version":"17.15.4c","status":"affected"},{"version":"17.12.5d","status":"affected"},{"version":"17.18.2","status":"affected"}]}],"references":["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz"],"weaknesses":["CWE-667"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/20xxx/CVE-2026-20065.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20065","state":"PUBLISHED","datePublished":"2026-03-04T17:48:49.615Z","dateUpdated":"2026-03-04T20:50:05.611Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2025-10-08T11:59:15.357Z"},"containers":{"cna":{"title":"Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability","descriptions":[{"lang":"en","value":"Multiple Cisco products are affected by a vulnerability in the Snort 3 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 an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly."}],"affected":[{"vendor":"Cisco","product":"Cisco Secure Firewall Threat Defense (FTD) Software","defaultStatus":"unknown","versions":[{"version":"7.0.0","status":"affected"},{"version":"7.0.0.1","status":"affected"},{"version":"7.0.1","status":"affected"},{"version":"7.1.0","status":"affected"},{"version":"7.0.1.1","status":"affected"},{"version":"7.1.0.1","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":"7.1.0.2","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":"7.1.0.3","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"},{"version":"7.3.1.2","status":"affected"},{"version":"7.2.8","status":"affected"},{"version":"7.6.0","status":"affected"},{"version":"7.4.2","status":"affected"},{"version":"7.2.8.1","status":"affected"},{"version":"7.0.6.3","status":"affected"},{"version":"7.4.2.1","status":"affected"},{"version":"7.2.9","status":"affected"},{"version":"7.0.7","status":"affected"},{"version":"7.4.2.2","status":"affected"},{"version":"7.2.10","status":"affected"},{"version":"7.4.2.3","status":"affected"},{"version":"7.0.8","status":"affected"},{"version":"7.0.8.1","status":"affected"},{"version":"7.4.2.4","status":"affected"},{"version":"7.2.10.2","status":"affected"}]},{"vendor":"Cisco","product":"Cisco 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