CVE-2026-13043 — Endpoint Security
HIGHCVE-2026-13043 is a high-severity (CVSS 8.8) Missing Authentication vulnerability in watchguard endpoint security. A fix is available — see the affected versions and patch details below.
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…
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-13043.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2026-13043 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 390,400 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Description
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.
Affected Products
endpoint securitywatchguardDetection & mitigation playbook
Vendor / applianceDetect
Inventory every watchguard endpoint security deployment and check each version against the affected-products list above.
Fix
Apply the watchguard endpoint security security patch or hotfix for CVE-2026-13043 on the affected version, following the vendor advisory for your exact build.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2026-13043 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.