High [CVE-2026-76490 +7] Cisco Expressway Series Security Hardening Release: October 2026
This high-severity Cisco advisory covers CVE-2026-76490 and CVE-2026-76491 and 6 more CVEs affecting TelePresence Video Communication Server (VCS) Expressway.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations. This bulletin covers 8 CVEs; its score, affected versions and guidance may apply to different issues within that bulletin.
VulniPulse record published Record updated
Android app · Google Play
Monitor future Cisco CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
Summary
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 a software hardening release that addresses multiple internally discovered vulnerabilities.
These vulnerabilities were found during internal testing and are not known to be actively exploited.
To assist customers in patching and streamline the disclosure process, Cisco has grouped these issues by their underlying vulnerability class - Common Weakness Enumeration (CWE) - and assigned a single Common Vulnerabilities and Exposures identifier (CVE ID) to each CWE grouping.
Cisco Expressway Series refers to Cisco Expressway Core (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices.
Note: Cisco may publish separate security advisories that provide additional details about individual vulnerabilities that are addressed in this release.
Cisco has released a software update that addresses these vulnerabilities. There are no workarounds that address these vulnerabilities.
This advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of October 21, 2026, Security Advisories.
- Scope: These vulnerabilities affect Cisco Expressway-C and Cisco Expressway-E, both virtual and appliance versions, regardless of device configuration.
- X14 and earlier — Migrate to a fixed release
- Release X15.5.3 and earlier (first fixed: X15.5.20)
Official advisory · high-confidence parse· fetched 14 hours ago·verify at source
- X15.5.20
Official advisory · high-confidence parse· fetched 14 hours ago·verify at source
Mitigation checklist
- Cisco has released a software update that addresses these vulnerabilities.
- There are no workarounds that address these vulnerabilities.
Official advisory · high-confidence parse· fetched 14 hours ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.