{"api_version":"1","generated_at":"2026-10-29T12:11:22+00:00","cve":"CVE-2025-20359","urls":{"html":"https://cve.report/CVE-2025-20359","api":"https://cve.report/api/cve/CVE-2025-20359.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-20359","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-20359"},"summary":{"title":"Multiple Cisco Products Snort 3 MIME Information Disclosure or Denial of Service Vulnerability","description":"Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow an unauthenticated, remote attacker to cause the disclosure of possible sensitive data or cause the Snort 3 Detection Engine to crash.\r\n\r\nThis vulnerability is due to an error in the logic of buffer handling when the MIME fields of the HTTP header are parsed. This can result in a buffer under-read. 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 induce one of two possible outcomes: the unexpected restarting of the Snort 3 Detection Engine, which could cause a denial of service (DoS) condition, or information disclosure of sensitive information in the Snort 3 data stream. Due to the under-read condition, it is possible that sensitive information that is not valid connection data could be returned.","state":"PUBLISHED","assigner":"cisco","published_at":"2025-10-15 17:15:49","updated_at":"2026-09-17 19:25:01"},"problem_types":["CWE-127","CWE-127 Buffer Under-read"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"9.1","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"psirt@cisco.com","type":"Secondary","score":"6.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"CVSSV3_1","score":"6.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","version":"3.1"}}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-mime-vulns-tTL8PgVH","name":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-mime-vulns-tTL8PgVH","refsource":"psirt@cisco.com","tags":["Vendor 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SNORT IPS Engine Software","version":"affected 16.12.6","platforms":[]},{"source":"CNA","vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","version":"affected 17.6.2","platforms":[]},{"source":"CNA","vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","version":"affected 17.8.1a","platforms":[]},{"source":"CNA","vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","version":"affected 16.12.7","platforms":[]},{"source":"CNA","vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","version":"affected 17.3.5","platforms":[]},{"source":"CNA","vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","version":"affected 17.6.3","platforms":[]},{"source":"CNA","vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","version":"affected 17.6.3a","platforms":[]},{"source":"CNA","vendor":"Cisco","product":"Cisco UTD SNORT IPS Engine Software","version":"affected 17.7.2","platforms":[]},{"source":"CNA","vendor":"Cisco","product":"Cisco 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Software","vendor":"Cisco","versions":[{"status":"affected","version":"3.17.1S"},{"status":"affected","version":"16.12.3"},{"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":"3.17.0S"},{"status":"affected","version":"16.6.5"},{"status":"affected","version":"17.2.1r"},{"status":"affected","version":"17.1.1"},{"status":"affected","version":"16.6.7a"},{"status":"affected","version":"16.6.1"},{"status":"affected","version":"16.12.1a"},{"status":"affected","version":"17.3.2"},{"status":"affected","version":"17.4.1a"},{"status":"affected","version":"16.12.5"},{"status":"affected","version":"17.5.1"},{"status":"affected","version":"16.6.9"},{"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":"16.6.10"},{"status":"affected","version":"17.7.1a"},{"status":"affected","version":"16.12.6"},{"status":"affected","version":"17.6.2"},{"status":"affected","version":"17.8.1a"},{"status":"affected","version":"16.12.7"},{"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":"17.3.6"},{"status":"affected","version":"16.12.8"},{"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":"17.12.1a"},{"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":"17.12.2"},{"status":"affected","version":"17.12.3"},{"status":"affected","version":"17.6.7"},{"status":"affected","version":"17.12.3a"},{"status":"affected","version":"17.12.4"},{"status":"affected","version":"17.6.8"},{"status":"affected","version":"17.6.8a"},{"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":"17.15.3a"},{"status":"affected","version":"17.15.3"},{"status":"affected","version":"17.12.5b"},{"status":"affected","version":"17.15.4"}]}],"descriptions":[{"lang":"en","value":"Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow an unauthenticated, remote attacker to cause the disclosure of possible sensitive data or cause the Snort 3 Detection Engine to crash.\r\n\r\nThis vulnerability is due to an error in the logic of buffer handling when the MIME fields of the HTTP header are parsed. This can result in a buffer under-read. 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 induce one of two possible outcomes: the unexpected restarting of the Snort 3 Detection Engine, which could cause a denial of service (DoS) condition, or information disclosure of sensitive information in the Snort 3 data stream. Due to the under-read condition, it is possible that sensitive information that is not valid connection data could be returned."}],"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."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","version":"3.1"},"format":"cvssV3_1"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-127","description":"Buffer Under-read","lang":"en","type":"cwe"}]}],"providerMetadata":{"dateUpdated":"2026-02-12T18:57:32.563Z","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco"},"references":[{"name":"cisco-sa-snort3-mime-vulns-tTL8PgVH","url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-mime-vulns-tTL8PgVH"}],"source":{"advisory":"cisco-sa-snort3-mime-vulns-tTL8PgVH","defects":["CSCwq15864"],"discovery":"EXTERNAL"},"title":"Multiple Cisco Products Snort 3 MIME Information Disclosure or Denial of Service Vulnerability"}},"cveMetadata":{"assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","assignerShortName":"cisco","cveId":"CVE-2025-20359","datePublished":"2025-10-15T16:17:31.374Z","dateReserved":"2024-10-10T19:15:13.258Z","dateUpdated":"2026-02-12T18:57:32.563Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-10-15 17:15:49","lastModifiedDate":"2026-09-17 19:25:01","problem_types":["CWE-127","CWE-127 Buffer Under-read"],"metrics":{"cvssMetricV31":[{"source":"psirt@cisco.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":2.5},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2025-10-15T17:40:59.232004Z","id":"CVE-2025-20359","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:cisco:snort:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0.0-233","versionEndExcluding":"3.9.3.0","matchCriteriaId":"1FCDD0AB-B7FD-4D7B-8747-08156F987255"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"20359","Ordinal":"1","Title":"Multiple Cisco Products Snort 3 MIME Information Disclosure or D","CVE":"CVE-2025-20359","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"20359","Ordinal":"1","NoteData":"Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow an unauthenticated, remote attacker to cause the disclosure of possible sensitive data or cause the Snort 3 Detection Engine to crash.\r\n\r\nThis vulnerability is due to an error in the logic of buffer handling when the MIME fields of the HTTP header are parsed. This can result in a buffer under-read. 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 induce one of two possible outcomes: the unexpected restarting of the Snort 3 Detection Engine, which could cause a denial of service (DoS) condition, or information disclosure of sensitive information in the Snort 3 data stream. Due to the under-read condition, it is possible that sensitive information that is not valid connection data could be returned.","Type":"Description","Title":"Multiple Cisco Products Snort 3 MIME Information Disclosure or D"}]}}}