CVE-2026-86134 — Fireware OS Pre-Authentication NULL Pointer Dereference Allows Remote Denial of Service

CVE-2026-86134

Fireware OS Pre-Authentication NULL Pointer Dereference Allows Remote Denial of Service PUBLISHED

Description (CNA)

A NULL pointer dereference vulnerability in the WatchGuard Fireware OS authentication process allows a remote, unauthenticated attacker to crash the management daemon by sending a specially request to the login interface, resulting in a denial of service.

Affected (CNA)

Vendor / product	Versions
WatchGuard / Fireware OS	affected 2026.3 before 2026.3.2; affected 2025.0 before 2026.2.3; affected 12.0 before 12.12.3
WatchGuard / Fireware OS	affected 12.0 before 12.5.21

CWE

CWE-476

References

https://psirt.watchguard.com/CVE-2026-86134

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.