{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-76491 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-76491 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-76491 is a high-severity vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway, published on 21 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-76491 and fix it if it is affected.\n\nWhat it is: CVE-2026-76491 is a high-severity vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway, published on 21 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-76491 in the wild and no public exploit code.\n\nAffected product: Cisco TelePresence Video Communication Server (VCS) Expressway. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-76491/ (Markdown: https://insights.sbomify.com/CVE-2026-76491/index.md)","id":"CVE-2026-76491","markdown":"https://insights.sbomify.com/CVE-2026-76491/index.md","name":"CVE-2026-76491","record":{"aliases":["GHSA-qw7h-fjr8-4575"],"analysis":null,"analysis_generated_by":null,"assigner":"cisco","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-617","name":"Reachable Assertion"}],"description":"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. \u0026nbsp;\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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Cisco Expressway Series Software Hardening Release: October 2026 - Denial of Service Vulnerabilities","id":"CVE-2026-76491","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Expressway Series Software Hardening Release: October 2026 - NULL Pointer Vulnerabilities","id":"CVE-2026-76492"},"packages":[],"prev":{"headline":"Cisco Expressway Series Software Hardening Release: October 2026 - Out-of-bounds Write Vulnerabilities","id":"CVE-2026-76490"},"products":["Cisco TelePresence Video Communication Server (VCS) Expressway"],"published":"2026-10-21","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-22","vendors":["Cisco"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-76491/"}