{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-20011", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "state": "PUBLISHED", "assignerShortName": "cisco", "dateReserved": "2025-10-08T11:59:15.350Z", "datePublished": "2026-10-21T16:12:19.429Z", "dateUpdated": "2026-10-22T19:11:17.797Z" }, "containers": { "cna": { "title": "Multiple Cisco Products Snort 3 SMTP MIME 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 SMTP MIME Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart.\r\n\r\nThis vulnerability is due to a lack of error checking when the MIME fields of the SMTP header are parsed. An attacker could exploit this vulnerability by sending crafted SMTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine unexpectedly restarts." } ], "references": [ { "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-mime-vulns-bkXjcKkt", "name": "cisco-sa-snort3-mime-vulns-bkXjcKkt" } ], "exploits": [ { "lang": "en", "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory." } ], "source": { "advisory": "cisco-sa-snort3-mime-vulns-bkXjcKkt", "discovery": "INTERNAL", "defects": [ "CSCws62055" ] }, "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Buffer Access with Incorrect Length Value", "type": "cwe", "cweId": "CWE-805" } ] } ], "affected": [ { "vendor": "Cisco", "product": "Cisco Open Source Snort3", "versions": [ { "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" }, { "version": "3.1.36.0", "status": "affected" }, { "version": "3.1.38.0", "status": "affected" }, { "version": "3.1.39.0", "status": "affected" }, { "version": "3.1.40.0", "status": "affected" }, { "version": "3.1.41.0", "status": "affected" }, { "version": "3.1.42.0", "status": "affected" }, { "version": "3.1.43.0", "status": "affected" }, { "version": "3.1.45.0", "status": "affected" }, { "version": "3.1.47.0", "status": "affected" }, { "version": "3.1.48.0", "status": "affected" }, { "version": "3.1.50.0", "status": "affected" }, { "version": "3.1.51.0", "status": "affected" }, { "version": "3.1.52.0", "status": "affected" }, { "version": "3.1.53.0", "status": "affected" }, { "version": "3.1.55.0", "status": "affected" }, { "version": "3.1.56.0", "status": "affected" }, { "version": "3.1.57.0", "status": "affected" }, { "version": "3.1.58.0", "status": "affected" }, { "version": "3.1.59.0", "status": "affected" }, { "version": "3.1.60.0", "status": "affected" }, { "version": "3.1.61.0", "status": "affected" }, { "version": "3.1.62.0", "status": "affected" }, { "version": "3.1.63.0", "status": "affected" }, { "version": "3.1.64.0", "status": "affected" }, { "version": "3.1.65.0", "status": "affected" }, { "version": "3.1.66.0", "status": "affected" }, { "version": "3.1.67.0", "status": "affected" }, { "version": "3.1.69.0", "status": "affected" }, { "version": "3.1.70.0", "status": "affected" }, { "version": "3.1.71.0", "status": "affected" }, { "version": "3.1.72.0", "status": "affected" }, { "version": "3.1.73.0", "status": "affected" }, { "version": "3.1.74.0", "status": "affected" }, { "version": "3.1.75.0", "status": "affected" }, { "version": "3.1.76.0", "status": "affected" }, { "version": "3.1.77.0", "status": "affected" }, { "version": "3.1.78.0", "status": "affected" }, { "version": "3.1.81.0", "status": "affected" }, { "version": "3.1.82.0", "status": "affected" }, { "version": "3.1.83.0", "status": "affected" }, { "version": "3.1.84.0", "status": "affected" }, { "version": "3.2.1.0", "status": "affected" }, { "version": "3.2.2.0", "status": "affected" }, { "version": "3.3.0.0", "status": "affected" }, { "version": "3.3.1.0", "status": "affected" }, { "version": "3.3.2.0", "status": "affected" }, { "version": "3.3.3.0", "status": "affected" }, { "version": "3.3.4.0", "status": "affected" }, { "version": "3.3.5.0", "status": "affected" }, { "version": "3.3.7.0", "status": "affected" }, { "version": "3.5.0.0", "status": "affected" }, { "version": "3.5.1.0", "status": "affected" }, { "version": "3.8.1.0", "status": "affected" }, { "version": "3.6.0.0", "status": "affected" }, { "version": "3.6.2.0", "status": "affected" }, { "version": "3.9.3.0", "status": "affected" }, { "version": "3.7.2.0", "status": "affected" }, { "version": "3.7.0.0", "status": "affected" }, { "version": "3.9.6.0", "status": "affected" }, { "version": "3.10.0.0", "status": "affected" }, { "version": "3.7.4.0", "status": "affected" }, { "version": "3.9.0.0", "status": "affected" }, { "version": "3.5.2.0", "status": "affected" }, { "version": "3.6.1.0", "status": "affected" }, { "version": "3.9.2.0", "status": "affected" }, { "version": "3.6.3.0", "status": "affected" }, { "version": "3.9.5.0", "status": "affected" }, { "version": "3.7.1.0", "status": "affected" }, { "version": "3.9.7.0", "status": "affected" }, { "version": "3.7.3.0", "status": "affected" }, { "version": "3.9.1.0", "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": "7.0.1.1", "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" }, { "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": "7.7.11", "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" }, { "version": "7.6.4", "status": "affected" }, { "version": "10.0.0", "status": "affected" }, { "version": "7.4.4", "status": "affected" }, { "version": "7.0.9", "status": "affected" }, { "version": "7.2.11", "status": "affected" } ], "defaultStatus": "unknown" }, { "vendor": "Cisco", "product": "Cisco UTD SNORT IPS Engine Software", "versions": [ { "version": "3.17.1S", "status": "affected" }, { "version": "16.12.3", "status": "affected" }, { "version": "Fuji-16.9.5", "status": "affected" }, { "version": "16.12.4", "status": "affected" }, { "version": "17.3.1a", "status": "affected" }, { "version": "16.6.6", "status": "affected" }, { "version": "16.12.2", "status": "affected" }, { "version": "Fuji-16.9.6", "status": "affected" }, { "version": "3.17.0S", "status": "affected" }, { "version": "Fuji-16.9.3", "status": "affected" }, { "version": "Denali-16.3.7", "status": "affected" }, { "version": "Fuji-16.9.2", "status": "affected" }, { "version": "Fuji-16.9.4", "status": "affected" }, { "version": "Everest-16.6.4", "status": "affected" }, { "version": "Everest-16.6.3", "status": "affected" }, { "version": "16.6.5", "status": "affected" }, { "version": "Denali-16.3.5", "status": "affected" }, { "version": "17.2.1r", "status": "affected" }, { "version": "17.1.1", "status": "affected" }, { "version": "Everest-16.6.2", "status": "affected" }, { "version": "16.6.7a", "status": "affected" }, { "version": "Denali-16.3.4", "status": "affected" }, { "version": "16.6.1", "status": "affected" }, { "version": "Denali-16.3.9", "status": "affected" 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"affected" } ], "defaultStatus": "unknown" } ], "providerMetadata": { "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2026-10-22T19:11:17.797Z" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-20011", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-10-21T17:21:13.598133Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-22T13:37:56.428Z" } } ] } }