{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-76490","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","state":"PUBLISHED","assignerShortName":"cisco","dateReserved":"2026-08-19T12:02:03.640Z","datePublished":"2026-10-21T16:17:29.557Z","dateUpdated":"2026-10-22T13:37:52.794Z"},"containers":{"cna":{"title":"Cisco Expressway Series Software Hardening Release: October 2026 - Out-of-bounds Write Vulnerabilities","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:H","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","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-2026-76490 are related to issues concerning out-of-bounds writes that are grouped under the Common Weakness Enumeration (CWE) Base CWE-787."}],"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":["CSCww67928"]},"problemTypes":[{"descriptions":[{"lang":"en","description":"Out-of-bounds Write","type":"cwe","cweId":"CWE-787"}]}],"affected":[{"vendor":"Cisco","product":"Cisco TelePresence Video Communication Server (VCS) 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