Cisco Expressway Series Remote Code Execution Vulnerability
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.
CVE-2026-76466
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-76466
Cisco TelePresence Video Communication Server (VCS) Expressway
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Cisco",
"product": "Cisco TelePresence Video Communication Server (VCS) Expressway",
"versions": [
{
"status": "affected",
"version": "X8.11.2"
},
{
"status": "affected",
"version": "X8.6"
},
{
"status": "affected",
"version": "X8.11.3"
},
{
"status": "affected",
"version": "X8.2.2"
},
{
"status": "affected",
"version": "X8.8.3"
},
{
"status": "affected",
"version": "X8.11.0"
},
{
"status": "affected",
"version": "X12.5.2"
},
{
"status": "affected",
"version": "X8.1.1"
},
{
"status": "affected",
"version": "X8.9"
},
{
"status": "affected",
"version": "X12.5.1"
},
{
"status": "affected",
"version": "X12.5.6"
},
{
"status": "affected",
"version": "X8.7.3"
},
{
"status": "affected",
"version": "X12.6.0"
},
{
"status": "affected",
"version": "X8.11.1"
},
{
"status": "affected",
"version": "X8.5"
},
{
"status": "affected",
"version": "X8.9.1"
},
{
"status": "affected",
"version": "X8.10.2"
},
{
"status": "affected",
"version": "X8.8.2"
},
{
"status": "affected",
"version": "X8.5.3"
},
{
"status": "affected",
"version": "X8.1"
},
{
"status": "affected",
"version": "X8.9.2"
},
{
"status": "affected",
"version": "X8.11.4"
},
{
"status": "affected",
"version": "X12.5.4"
},
{
"status": "affected",
"version": "X8.8.1"
},
{
"status": "affected",
"version": "X8.2.1"
},
{
"status": "affected",
"version": "X8.5.1"
},
{
"status": "affected",
"version": "X8.6.1"
},
{
"status": "affected",
"version": "X8.1.2"
},
{
"status": "affected",
"version": "X8.8"
},
{
"status": "affected",
"version": "X8.10.0"
},
{
"status": "affected",
"version": "X12.5.3"
},
{
"status": "affected",
"version": "X8.10.1"
},
{
"status": "affected",
"version": "X12.5.7"
},
{
"status": "affected",
"version": "X8.10.3"
},
{
"status": "affected",
"version": "X8.7.1"
},
{
"status": "affected",
"version": "X8.2"
},
{
"status": "affected",
"version": "X12.5.8"
},
{
"status": "affected",
"version": "X8.7"
},
{
"status": "affected",
"version": "X8.5.2"
},
{
"status": "affected",
"version": "X12.5.9"
},
{
"status": "affected",
"version": "X12.5.0"
},
{
"status": "affected",
"version": "X8.10.4"
},
{
"status": "affected",
"version": "X8.7.2"
},
{
"status": "affected",
"version": "X12.5.5"
},
{
"status": "affected",
"version": "X12.6.1"
},
{
"status": "affected",
"version": "X12.6.2"
},
{
"status": "affected",
"version": "X12.6.3"
},
{
"status": "affected",
"version": "X12.6.4"
},
{
"status": "affected",
"version": "X12.7.0"
},
{
"status": "affected",
"version": "X12.7.1"
},
{
"status": "affected",
"version": "X14.0.0"
},
{
"status": "affected",
"version": "X14.0.1"
},
{
"status": "affected",
"version": "X14.0.2"
},
{
"status": "affected",
"version": "X14.0.3"
},
{
"status": "affected",
"version": "X14.0.4"
},
{
"status": "affected",
"version": "X14.0.5"
},
{
"status": "affected",
"version": "X14.0.6"
},
{
"status": "affected",
"version": "X14.0.7"
},
{
"status": "affected",
"version": "X14.0.8"
},
{
"status": "affected",
"version": "X14.2.0"
},
{
"status": "affected",
"version": "X14.0.9"
},
{
"status": "affected",
"version": "X14.2.1"
},
{
"status": "affected",
"version": "X14.2.2"
},
{
"status": "affected",
"version": "X14.0.11"
},
{
"status": "affected",
"version": "X14.2.5"
},
{
"status": "affected",
"version": "X14.0.10"
},
{
"status": "affected",
"version": "X14.2.6"
},
{
"status": "affected",
"version": "X14.2.7"
},
{
"status": "affected",
"version": "X14.3.0"
},
{
"status": "affected",
"version": "X14.3.1"
},
{
"status": "affected",
"version": "X14.3.2"
},
{
"status": "affected",
"version": "X14.3.3"
},
{
"status": "affected",
"version": "X15.0.0"
},
{
"status": "affected",
"version": "X14.3.4"
},
{
"status": "affected",
"version": "X14.3.5"
},
{
"status": "affected",
"version": "X15.0.1"
},
{
"status": "affected",
"version": "X15.0.2"
},
{
"status": "affected",
"version": "X15.0.3"
},
{
"status": "affected",
"version": "X14.3.6"
},
{
"status": "affected",
"version": "X15.2.0"
},
{
"status": "affected",
"version": "X15.2.1"
},
{
"status": "affected",
"version": "X15.2.2"
},
{
"status": "affected",
"version": "X15.2.3"
},
{
"status": "affected",
"version": "X14.3.7"
},
{
"status": "affected",
"version": "X15.2.4."
},
{
"status": "affected",
"version": "X15.2.4"
},
{
"status": "affected",
"version": "X15.3.0"
},
{
"status": "affected",
"version": "X15.3.1"
},
{
"status": "affected",
"version": "X15.3.2"
},
{
"status": "affected",
"version": "X15.4.0"
},
{
"status": "affected",
"version": "X15.5.0"
},
{
"status": "affected",
"version": "X15.5.1"
},
{
"status": "affected",
"version": "X15.5.2"
},
{
"status": "affected",
"version": "X15.5.3"
}
],
"defaultStatus": "unknown"
}
]- Related CVEs
- CVE-2026-76466
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #52510 · Revision 1
- Added to Heist Feed
- Publisher date