{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20067","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","state":"PUBLISHED","assignerShortName":"cisco","dateReserved":"2025-10-08T11:59:15.357Z","datePublished":"2026-03-04T17:49:02.938Z","dateUpdated":"2026-03-04T20:45:50.116Z"},"containers":{"cna":{"title":"Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability","metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","baseScore":5.8,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"}}],"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 incomplete error checking when parsing the Multicast DNS fields of the HTTP header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts."}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz","name":"cisco-sa-snort3-multi-dos-XFWkWSwz"}],"exploits":[{"lang":"en","value":"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."}],"source":{"advisory":"cisco-sa-snort3-multi-dos-XFWkWSwz","discovery":"INTERNAL","defects":["CSCwq01530"]},"problemTypes":[{"descriptions":[{"lang":"en","description":"Out-of-bounds Write","type":"cwe","cweId":"CWE-787"}]}],"affected":[{"vendor":"Cisco","product":"Cisco Cyber Vision","versions":[{"version":"3.0.0","status":"affected"},{"version":"3.0.2","status":"affected"},{"version":"3.0.3","status":"affected"},{"version":"3.0.1","status":"affected"},{"version":"3.1.0","status":"affected"},{"version":"3.0.4","status":"affected"},{"version":"3.1.1","status":"affected"},{"version":"3.1.2","status":"affected"},{"version":"3.2.0","status":"affected"},{"version":"3.0.5","status":"affected"},{"version":"3.2.1","status":"affected"},{"version":"3.0.6","status":"affected"},{"version":"3.2.2","status":"affected"},{"version":"3.2.3","status":"affected"},{"version":"3.2.4","status":"affected"},{"version":"4.0.0","status":"affected"},{"version":"4.0.1","status":"affected"},{"version":"4.0.2","status":"affected"},{"version":"4.0.3","status":"affected"},{"version":"4.1.0","status":"affected"},{"version":"4.1.1","status":"affected"},{"version":"4.1.2","status":"affected"},{"version":"4.1.3","status":"affected"},{"version":"4.1.4","status":"affected"},{"version":"4.2.0","status":"affected"},{"version":"4.2.1","status":"affected"},{"version":"4.1.5","status":"affected"},{"version":"4.2.2","status":"affected"},{"version":"4.2.X","status":"affected"},{"version":"4.2.3","status":"affected"},{"version":"4.2.4","status":"affected"},{"version":"4.2.6","status":"affected"},{"version":"4.1.6","status":"affected"},{"version":"4.3.0","status":"affected"},{"version":"4.3.1","status":"affected"},{"version":"4.3.2","status":"affected"},{"version":"4.3.3","status":"affected"},{"version":"4.4.0","status":"affected"},{"version":"4.4.1","status":"affected"},{"version":"4.4.2","status":"affected"},{"version":"4.4.3","status":"affected"},{"version":"4.1.7","status":"affected"},{"version":"5.0.0","status":"affected"},{"version":"5.0.1","status":"affected"},{"version":"5.0.2","status":"affected"},{"version":"5.1.0","status":"affected"},{"version":"5.1.1","status":"affected"},{"version":"5.1.2","status":"affected"},{"version":"5.1.3","status":"affected"},{"version":"5.2.0","status":"affected"},{"version":"5.2.1","status":"affected"},{"version":"5.3.0","status":"affected"},{"version":"5.3.1","status":"affected"},{"version":"5.3.2","status":"affected"}],"defaultStatus":"unknown"},{"vendor":"Cisco","product":"Cisco Secure Firewall Threat Defense (FTD) Software","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":"7.7.0","status":"affected"},{"version":"7.4.2.2","status":"affected"},{"version":"7.2.10","status":"affected"},{"version":"7.6.1","status":"affected"},{"version":"7.4.2.3","status":"affected"},{"version":"7.0.8","status":"affected"},{"version":"7.6.2","status":"affected"},{"version":"7.7.10","status":"affected"},{"version":"7.0.8.1","status":"affected"},{"version":"7.6.2.1","status":"affected"},{"version":"7.7.10.1","status":"affected"},{"version":"7.4.2.4","status":"affected"},{"version":"7.2.10.2","status":"affected"},{"version":"7.4.3","status":"affected"}],"defaultStatus":"unknown"},{"vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","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"}],"defaultStatus":"unknown"}],"providerMetadata":{"orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco","dateUpdated":"2026-03-04T17:49:02.938Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-04T20:45:34.157079Z","id":"CVE-2026-20067","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-04T20:45:50.116Z"}}]}}