---
id: CVE-2026-3344
title: >-
  A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the
  Fireware OS filesystem integrity check and maintain limited persistence via a
  maliciously-crafted firmware update package.
summary: >-
  A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the
  Fireware OS filesystem integrity check and maintain limited persistence via a
  maliciously-crafted firmware update package.
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-440
vendor: watchguard
product: fireware
affected:
  - 'fireware >= 12.0, < 12.11.8'
  - 'fireware >= 12.5.9, < 12.5.17'
  - 'fireware >= 2025.1, < 2026.1.2'
patched:
  - fireware 2026.1.2
published: '2026-03-03'
updated: '2026-08-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-3344'
references:
  - url: 'https://psirt.watchguard.com/CVE-2026-3344'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
  - url: 'https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00005'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
tags:
  - nvd
epss: 0.00276
epssPercentile: 0.20258
ingestedAt: '2026-08-11T16:47:04.048Z'
---

## Overview

A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS filesystem integrity check and maintain limited persistence via a maliciously-crafted firmware update package.

## Affected

- `fireware >= 12.0, < 12.11.8`
- `fireware >= 12.5.9, < 12.5.17`
- `fireware >= 2025.1, < 2026.1.2`

## Remediation

Upgrade past the affected range:

- `fireware 2026.1.2`