CVE-2026-76462 — Cisco Secure Client Privilege Escalation Vulnerability

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Cisco / Cisco Secure Client	affected 4.9.00086; affected 4.9.01095; affected 4.9.02028; affected 4.9.03047; affected 4.9.03049; affected 4.9.04043; affected 4.9.04053; affected 4.9.05042; affected 4.9.06037; affected 4.10.00093; affected 4.10.01075; affected 4.10.02086; affected 4.10.03104; affected 4.10.04065; affected 4.10.04071; affected 4.10.05085; affected 4.10.05095; affected 5.0.00238; affected 4.10.05111; affected 5.0.00529; affected 5.0.00556; affected 4.10.06079; affected 5.0.01242; affected 4.10.06090; affected 5.0.02075; affected 4.10.07061; affected 5.0.03072; affected 4.10.07062; affected 5.0.03076; affected 5.0.04032; affected 4.10.07073; affected 5.0.05040; affected 5.1.0.136; affected 5.1.1.42; affected 4.10.08025; affected 5.1.2.42; affected 4.10.08029; affected 5.1.3.62; affected 5.1.4.74; affected 5.1.5.65; affected 5.1.6.103; affected 5.1.7.80; affected 5.1.8.105; affected 5.1.8.122; affected 5.1.9.113; affected 5.1.10.233; affected 5.1.11.388; affected 5.1.12.146; affected 5.1.13.117; affected 5.1.13.177; affected 5.1.14.145; affected 5.1.15.287; affected 5.1.16.194; affected 5.1.17.3382; affected 5.1.17.3394; affected 5.1.18.314; affected 5.1.19.1862

Vendor / product

Versions

Cisco / Cisco Secure Client

affected 4.9.00086; affected 4.9.01095; affected 4.9.02028; affected 4.9.03047; affected 4.9.03049; affected 4.9.04043; affected 4.9.04053; affected 4.9.05042; affected 4.9.06037; affected 4.10.00093; affected 4.10.01075; affected 4.10.02086; affected 4.10.03104; affected 4.10.04065; affected 4.10.04071; affected 4.10.05085; affected 4.10.05095; affected 5.0.00238; affected 4.10.05111; affected 5.0.00529; affected 5.0.00556; affected 4.10.06079; affected 5.0.01242; affected 4.10.06090; affected 5.0.02075; affected 4.10.07061; affected 5.0.03072; affected 4.10.07062; affected 5.0.03076; affected 5.0.04032; affected 4.10.07073; affected 5.0.05040; affected 5.1.0.136; affected 5.1.1.42; affected 4.10.08025; affected 5.1.2.42; affected 4.10.08029; affected 5.1.3.62; affected 5.1.4.74; affected 5.1.5.65; affected 5.1.6.103; affected 5.1.7.80; affected 5.1.8.105; affected 5.1.8.122; affected 5.1.9.113; affected 5.1.10.233; affected 5.1.11.388; affected 5.1.12.146; affected 5.1.13.117; affected 5.1.13.177; affected 5.1.14.145; affected 5.1.15.287; affected 5.1.16.194; affected 5.1.17.3382; affected 5.1.17.3394; affected 5.1.18.314; affected 5.1.19.1862

CWE

CWE-20

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sec-client-priv-esc-muF8eZdm

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.