---
id: CVE-2026-111107
title: >-
  Fireware OS NULL Pointer Dereference in Management Interface Allows
  Unauthenticated Denial of Service
summary: >-
  A NULL pointer dereference vulnerability in WatchGuard Fireware OS’s
  management interface allows a remote, unauthenticated attacker with network
  access to the management interface to crash the management service by sending
  a specially cr…
severity: high
cvss: 8.7
cvssVector: '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'
cvssSource: cna
cwe:
  - CWE-1286
  - CWE-248
  - CWE-476
vendor: WatchGuard
product: Fireware OS
affected:
  - fireware_os >= 2025.1 < 2026.4
  - fireware_os >= 12.0 < 12.12.4
  - fireware_os >= 12.0 < 12.5.22
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T15:52:27.690Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111107'
references:
  - url: 'https://psirt.watchguard.com/CVE-2026-111107'
tags:
  - cve.org
ingestedAt: '2026-10-27T16:11:59.472Z'
---

## Overview

A NULL pointer dereference vulnerability in WatchGuard Fireware OS’s management interface allows a remote, unauthenticated attacker with network access to the management interface to crash the management service by sending a specially crafted login request. Repeated exploitation terminates all active administrator sessions and in-progress management operations and can prevent management of the device. Traffic processing is not affected.

## Affected

- `fireware_os >= 2025.1 < 2026.4`
- `fireware_os >= 12.0 < 12.12.4`
- `fireware_os >= 12.0 < 12.5.22`

## Remediation

Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22