CVE-2026-13043

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

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

WatchGuard · Endpoint Security

CVSS v4.0 CNA

9.3 CRITICALCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/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:X/R:X/V:X/RE:X/U:X

CVSS v3.1 NVD

8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS

0.13% chance of exploitation in the next 30 days, 2nd percentile

Published

2026-10-01

Proof-of-concept exploits (1)

• TheMalwareGuardian/CVE-2026-130431★ · 2026-10-07

Security advisories

• https://psirt.watchguard.com/CVE-2026-13043

References

• CVE Record
• NVD entry

Related

• CVE-2002-1120
• CVE-2003-0264
• CVE-2007-1567
• CVE-2017-14980
• CVE-2018-14847
• CVE-2018-18912