Cisco Expressway Series Security Hardening Release: October 2026

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 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 available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-exwy-hardening-FhcqBVcs 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 . Security Impact Rating: High CVE: CVE-2026-76490,CVE-2026-76491,CVE-2026-76492,CVE-2026-76493,CVE-2026-76494,CVE-2026-76495,CVE-2026-76496,CVE-2026-76497

What to do

Install the fixed versions listed in the official advisory. If you cannot update right away, apply the workarounds or mitigations it describes and limit access to the affected service.

Details

Vendor

Cisco

Product

Cisco Expressway

CVE

CVE-2026-76490, CVE-2026-76491, CVE-2026-76492, CVE-2026-76493, CVE-2026-76494, CVE-2026-76495, CVE-2026-76496, CVE-2026-76497

Affected versions

Cisco TelePresence Video Communication Server (VCS) Expressw 8.11: 5 versions, from X8.11.0 to X8.11.4
Cisco TelePresence Video Communication Server (VCS) Expressw 8.6: X8.6; X8.6.1
Cisco TelePresence Video Communication Server (VCS) Expressw 8.2: X8.2; X8.2.1; X8.2.2
Cisco TelePresence Video Communication Server (VCS) Expressw 8.8: 4 versions, from X8.8 to X8.8.3
Cisco TelePresence Video Communication Server (VCS) Expressw 12.5: 10 versions, from X12.5.0 to X12.5.9
Cisco TelePresence Video Communication Server (VCS) Expressw 8.1: X8.1; X8.1.1; X8.1.2
Cisco TelePresence Video Communication Server (VCS) Expressw 8.9: X8.9; X8.9.1; X8.9.2
Cisco TelePresence Video Communication Server (VCS) Expressw 8.7: 4 versions, from X8.7 to X8.7.3
Cisco TelePresence Video Communication Server (VCS) Expressw 12.6: 5 versions, from X12.6.0 to X12.6.4
Cisco TelePresence Video Communication Server (VCS) Expressw 8.5: 4 versions, from X8.5 to X8.5.3
Cisco TelePresence Video Communication Server (VCS) Expressw 8.10: 5 versions, from X8.10.0 to X8.10.4
Cisco TelePresence Video Communication Server (VCS) Expressw 12.7: X12.7.0; X12.7.1
Cisco TelePresence Video Communication Server (VCS) Expressw 14.0: 12 versions, from X14.0.0 to X14.0.11
Cisco TelePresence Video Communication Server (VCS) Expressw 14.2: 6 versions, from X14.2.0 to X14.2.7
Cisco TelePresence Video Communication Server (VCS) Expressw 14.3: 8 versions, from X14.3.0 to X14.3.7
Cisco TelePresence Video Communication Server (VCS) Expressw 15.0: 4 versions, from X15.0.0 to X15.0.3
Cisco TelePresence Video Communication Server (VCS) Expressw 15.2: 6 versions, from X15.2.0 to X15.2.4
Cisco TelePresence Video Communication Server (VCS) Expressw 15.3: X15.3.0; X15.3.1; X15.3.2
Cisco TelePresence Video Communication Server (VCS) Expressw 15.4: X15.4.0
Cisco TelePresence Video Communication Server (VCS) Expressw 15.5: 4 versions, from X15.5.0 to X15.5.3 (from the advisory and NVD; check the exact builds in the official advisory)

CVSS score

8.6

Actively exploited

Not known at this time

Source

Cisco PSIRT – original advisory

Published

October 27, 2026

The description and the recommended action are quoted from the public advisory (the action is our generic advice); severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.