Is CVE-2026-12374 in the CISA KEV catalog?

No. CVE-2026-12374 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-12374?

CVE-2026-12374 has a CVSS v4 base score of 6.4 (MEDIUM).

How do I fix or mitigate CVE-2026-12374?

No published fix for CVE-2026-12374 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-12374

MEDIUM

6.4

CVSS v4

NVD

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.

CWE-295Improper Certificate Validation CWE-367TOCTOU Race Condition

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v4 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

Impact

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:C/RE:L/U:Amber

Exploit Intelligence

EPSS data unavailable for this CVE.

References

Other references1

support.catonetworks.com

Embed a live status badge for CVE-2026-12374

Markdown

[![CVE-2026-12374](https://tridentstack.com/cve/badge/CVE-2026-12374.svg)](https://tridentstack.com/cve/CVE-2026-12374)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-12374"><img src="https://tridentstack.com/cve/badge/CVE-2026-12374.svg" alt="CVE-2026-12374"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-01.