{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20066","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","state":"PUBLISHED","assignerShortName":"cisco","dateReserved":"2025-10-08T11:59:15.357Z","datePublished":"2026-03-04T17:49:00.716Z","dateUpdated":"2026-03-04T20:46:18.739Z"},"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 an error in the JSTokenizer normalization logic when the HTTP inspection normalizes JavaScript. An attacker could exploit this vulnerability by sending crafted HTTP 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. JSTokenizer is not enabled by default."}],"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":["CSCwq23374"]},"problemTypes":[{"descriptions":[{"lang":"en","description":"Uncontrolled Resource Consumption","type":"cwe","cweId":"CWE-400"}]}],"affected":[{"vendor":"Cisco","product":"Cisco Secure Firewall Threat Defense (FTD) Software","versions":[{"version":"7.4.0","status":"affected"},{"version":"7.4.1","status":"affected"},{"version":"7.4.1.1","status":"affected"},{"version":"7.6.0","status":"affected"},{"version":"7.4.2","status":"affected"},{"version":"7.4.2.1","status":"affected"},{"version":"7.7.0","status":"affected"},{"version":"7.4.2.2","status":"affected"},{"version":"7.6.1","status":"affected"},{"version":"7.4.2.3","status":"affected"},{"version":"7.6.2","status":"affected"},{"version":"7.7.10","status":"affected"},{"version":"7.6.2.1","status":"affected"},{"version":"7.7.10.1","status":"affected"},{"version":"7.4.2.4","status":"affected"},{"version":"7.4.3","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":"2026-03-04T17:49:00.716Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-04T20:46:03.613675Z","id":"CVE-2026-20066","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":"2026-03-04T20:46:18.739Z"}}]}}