CVE-2026-76466

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vcs-static-cred-hr7EWZ8t

Configurations

No configuration.

History

21 Oct 2026, 17:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-21 17:19

Updated : 2026-10-22 23:19

NVD link : CVE-2026-76466

Mitre link : CVE-2026-76466

CVE.ORG link : CVE-2026-76466

JSON object : View

Products Affected

No product.

CWE

CWE-798

Use of Hard-coded Credentials

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{"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"}]}], "published": "2026-10-21T17:19:06.813", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vcs-static-cred-hr7EWZ8t", "source": "psirt@cisco.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-798"}]}], "descriptions": [{"lang": "en", "value": "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.\r\n\r\nThis 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.\r\nNote: Cisco Expressway Series refers to Cisco Expressway Core (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices."}], "lastModified": "2026-10-22T23:19:07.397", "sourceIdentifier": "psirt@cisco.com"}