CVE record · CVE-2026-13043

WatchGuard Endpoint Security Missing Authentication in Kernel Memory Access Driver Allows Arbitrary Kernel Memory Access

CVSS 9.3 CriticalCriticalEPSS 0.0015 · 4th percentile

Critical, because:

CVSS score 9.3: 9.0 or more.

Published by the CVE Program (CNA: WatchGuard) at 1 Oct 2026, 16:07 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
WatchGuard	Endpoint Security	affected before 8.00.26.0012 semver Other versions: unaffected

Identifiers: CVE-2026-13043
CNA: WatchGuard
Weakness (CWE): CWE-306 · CWE-798
Tags: WatchGuard Endpoint Security
Authentication bypass
Hard-coded credentials
Published: 1 Oct 2026
Updated: 1 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.3	Critical	4.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	CNA (WatchGuard)

CISA KEV Not listed.
EPSS 0.0015, the 4th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 1 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

psirt.watchguard.com/CVE-2026-13043 vendor-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.