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CVE-2026-86134

nvd nist
Published: Sep 30, 2026Modified: Oct 6, 2026

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8.7
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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
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CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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:XShow less
Source: 5d1c2695-1a31-4499-88ae-e847036fd7e3 (Secondary)

Description

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 (4)

Products: Watchguard: Fireware
Watchguard
1 product
Fireware
Configuration A
4 vulnerable
Vulnerable SoftwareAffected Versions
Watchguard
Fireware
From 12.0 to 12.5.21
Fireware
From 12.12 to 12.12.3
Fireware
From 2025.0 to 2026.2.3
Fireware
From 2026.3 to 2026.3.2

Related CWEs

CWE-476
NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.

References (1)

Source: 5d1c2695-1a31-4499-88ae-e847036fd7e3
PatchVendor Advisory

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