CVE-2026-12374

Improper XPC caller certificate validation and TOCTOU race condition in macOS PrivilegedHelperTool

State: Published
Severity: 6.4 Medium
Published: Jul 1, 2026
Updated: Jul 1, 2026
Reserved: Jun 16, 2026

Description

Improper certificate validation and a time-of-check time-of-use (TOCTOU) race condition in the PrivilegedHelperTool XPC service in Cato Client before v.5.13.1 on macOS allows a local authenticated attacker to escalate privileges to root via a self-signed certificate that bypasses the XPC caller verification and a symlink swap during package installation.

Scores

CVSS	Score	Vector	Source
4.0	6.4 Medium	CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/AU:Y/R:U/V:C/RE:L/U:Amber	Cato

Weaknesses

CWE-295 Improper certificate validation
CWE-367 Time-of-check time-of-use (TOCTOU) race condition

Affected Products

Product	Versions
SDP ClientCato Networks	5.12.0 to before 5.13.1Affected

References

https://support.catonetworks.com/hc/en-us/articles/37284626576413-Security-Vulnerability-CVE-2026-12374-that-Impacts-macOS-Client-Versions-Lower-than-5-13-1

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.