# CVE-2026-13043 — WatchGuard Endpoint Security

> 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”.

**Last updated:** 2026-10-01

## 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](https://intel.threadlinqs.com/cwe/CWE-306), [CWE-798](https://intel.threadlinqs.com/cwe/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.

- [TheMalwareGuardian/CVE-2026-13043](https://github.com/TheMalwareGuardian/CVE-2026-13043) (github)

## Affected products and versions

- [WatchGuard](https://intel.threadlinqs.com/vendors/watchguard): Endpoint Security

## 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.

- [CVE-2026-13043: WatchGuard/Panda Kernel Memory Access Driver (pskmad.sys) Missing Authentication Exposes Kernel and Process Memory](https://intel.threadlinqs.com/threat/TL-2026-3315) — CRITICAL · 2026-10-11

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-10-11. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [psirt.watchguard.com — vendor advisory](https://psirt.watchguard.com/CVE-2026-13043)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-13043
Full detection coverage and IOCs for threats exploiting CVE-2026-13043 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp