{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-76491", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "state": "PUBLISHED", "assignerShortName": "cisco", "dateReserved": "2026-08-19T12:02:03.640Z", "datePublished": "2026-10-21T16:17:04.407Z", "dateUpdated": "2026-10-22T13:37:53.379Z" }, "containers": { "cna": { "title": "Cisco Expressway Series Software Hardening Release: October 2026 - Denial of Service Vulnerabilities", "metrics": [ { "format": "cvssV3_1", "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH" } } ], "descriptions": [ { "lang": "en", "value": "As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Expressway Series software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.  \r\n\r\nThe vulnerabilities tracked by CVE-2026-76491 are related to issues concerning reachable assertions that are grouped under the Common Weakness Enumeration (CWE) Base CWE-617." } ], "references": [ { "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-exwy-hardening-FhcqBVcs", "name": "cisco-sa-exwy-hardening-FhcqBVcs" } ], "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-exwy-hardening-FhcqBVcs", "discovery": "INTERNAL", "defects": [ "CSCww67923" ] }, "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Reachable Assertion", "type": "cwe", "cweId": "CWE-617" } ] } ], "affected": [ { "vendor": "Cisco", "product": "Cisco TelePresence Video Communication Server (VCS) Expressway", "versions": [ { "version": "X8.11.2", "status": "affected" }, { "version": "X8.6", "status": "affected" }, { "version": "X8.11.3", "status": "affected" }, { "version": "X8.2.2", "status": "affected" }, { "version": "X8.8.3", "status": "affected" }, { "version": "X8.11.0", "status": "affected" }, { "version": "X12.5.2", "status": "affected" }, { "version": "X8.1.1", "status": "affected" }, { "version": "X8.9", "status": "affected" }, { "version": "X12.5.1", "status": "affected" }, { "version": "X12.5.6", "status": "affected" }, { "version": "X8.7.3", "status": "affected" }, { "version": "X12.6.0", "status": "affected" }, { "version": "X8.11.1", "status": "affected" }, { "version": "X8.5", "status": "affected" }, { "version": "X8.9.1", "status": "affected" }, { "version": "X8.10.2", "status": "affected" }, { "version": "X8.8.2", "status": "affected" }, { "version": "X8.5.3", "status": "affected" }, { "version": "X8.1", "status": "affected" }, { 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"2026-10-21T17:15:05.406749Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-22T13:37:53.379Z" } } ] } }