Medium [CVE-2026-76462] Cisco Secure Client Secure Firewall Posture Module Privilege Escalation Vulnerability
This medium-severity Cisco advisory covers CVE-2026-76462 affecting Secure Client.
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Summary
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.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
- Scope: This vulnerability affects the Secure Firewall Posture module in Cisco Secure Client for Windows, macOS, and Linux.
- Release Earlier than 5.1.20.333 (first fixed: 5.1.20.333)
Official advisory · high-confidence parse· fetched 11 hours ago·verify at source
- 5.1.20.333
Official advisory · high-confidence parse· fetched 11 hours ago·verify at source
Mitigation checklist
- Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
- Earlier than 5.1.20.333: upgrade to 5.1.20.333.
- There are no workarounds that address this vulnerability.
Official advisory · high-confidence parse· fetched 11 hours ago·verify at source
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