CVE-2026-76462
Cisco Secure Client Privilege Escalation Vulnerability
Description
A vulnerability in the interprocess communication (IPC) channel of the Secure Firewall Posture module in Cisco Secure Client could allow an authenticated, local attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a series of crafted IPC messages to a local socket. A successful exploit could allow the attacker to perform limited file write operations on the filesystem with SYSTEM or root privileges. Although this vulnerability affects the Secure Firewall Posture module in Cisco Secure Client on Windows, macOS, and Linux operating systems, this vulnerability could be used to obtain full root privileges on macOS and Linux. For that reason Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates.
Weakness: CWE-20
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Secure Client (AnyConnect) | VPN & Remote Access | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Secure Client
Vendor advisory
cisco-sa-sec-client-priv-esc-muF8eZdm
Cisco Secure Client Secure Firewall Posture Module Privilege Escalation Vulnerability
Cisco’s rating: High (advisory CVSS 5.5) · Published Oct 21, 2026
Bug ID: CSCwu48192
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from