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VulnerabilityCVE-2026-13043Published 2026-10-01

CVE-2026-13043 — WatchGuard Endpoint Security

critical (derived)Public exploit1 PoC repo

As of 2026-10-01, CVE-2026-13043 is a Critical-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in WatchGuard Endpoint Security, CVSS v4.0 9.3, EPSS 0.1% (2.5th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-13043, most recently “CVE-2026-13043: WatchGuard/Panda Kernel Memory Access Driver (pskmad.sys) Missing Authentication Exposes Kernel and Process Memory”.

CVSS v4.0
9.3/10Critical (derived)
EPSS
0.1%Higher than 2.5% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
1Campaigns referencing it
Priority
6.8/10Threadlinqs triage score
Published
CVSS v4.0 9.3 (Critical, derived from score) · EPSS 0.1% (higher than 2.5% of all scored CVEs) · Priority 6.8/10 · Published 2026-10-01

Last updated:

What is CVE-2026-13043?

A missing authentication vulnerability in the Kernel Memory Access Driver (PSKMAD) used by WatchGuard endpoint security products allows a local, authenticated attacker to bypass the driver's access-control handshake and issue arbitrary privileged commands to the driver, resulting in disclosure of kernel and process memory.

The record classifies CVE-2026-13043 under weakness classes CWE-306, CWE-798. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 10 days ago.

Severity and exploitation probability

CVSS v4.0 base score
9.3 — Critical (derived from score)
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
EPSS (FIRST)
0.1% probability of exploitation in the next 30 days, higher than 2.5% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
6.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-10-01

Is CVE-2026-13043 being exploited?

Weaponised exploit code for CVE-2026-13043 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 41 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-13043

No vendor patch reference has been recorded for CVE-2026-13043 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-13043

1 tracked threat in the Threadlinqs corpus references CVE-2026-13043, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Vendor advisory and patch