Riskcovery

CVE-2026-76466

Cisco Expressway Series Remote Code Execution Vulnerability

State
Published
Severity
9.8 Critical
Published
Oct 21, 2026
Updated
Oct 22, 2026
Reserved
Aug 19, 2026

Read the record on cve.org

Description

A vulnerability in the database service feature of Cisco Expressway Series could allow an unauthenticated, remote attacker with network access to a Cisco Expressway device to execute arbitrary operating system commands as root.

This vulnerability is due to the use of persistent cookies. Additionally, there is insufficient validation of client certificates when the TLS Verify Mode is set to Enabled for clustering, which means that client certificates are not validated. An attacker with possession of the cookies could exploit this vulnerability by connecting to the database service and invoking specific remote procedure call (RPC) commands. A successful exploit could allow the attacker to execute arbitrary commands as root on the underlying operating system of an affected device. Note: Cisco Expressway Series refers to Cisco Expressway Core (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hcisco

Weaknesses

  • CWE-798 Use of Hard-coded Credentials

Affected Products

ProductVersions
Cisco TelePresence Video Communication Server (VCS) ExpresswayCisco
  • X8.11.2Affected
  • X8.6Affected
  • X8.11.3Affected
  • X8.2.2Affected
  • X8.8.3Affected
  • X8.11.0Affected
  • X12.5.2Affected
  • X8.1.1Affected
  • X8.9Affected
  • X12.5.1Affected
  • X12.5.6Affected
  • X8.7.3Affected
  • X12.6.0Affected
  • X8.11.1Affected
  • X8.5Affected
  • X8.9.1Affected
  • X8.10.2Affected
  • X8.8.2Affected
  • X8.5.3Affected
  • X8.1Affected
  • X8.9.2Affected
  • X8.11.4Affected
  • X12.5.4Affected
  • X8.8.1Affected
  • X8.2.1Affected
  • and 69 more versions

References

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