---
id: CVE-2026-4315
title: >-
  A Cross-Site Request Forgery (CSRF) vulnerability in the WatchGuard Fireware
  OS WebUI could allow a remote attacker to trigger a denial-of-service (DoS)
  condition in the Fireware Web UI by convincing an authenticated administrator
  into v…
summary: >-
  A Cross-Site Request Forgery (CSRF) vulnerability in the WatchGuard Fireware
  OS WebUI could allow a remote attacker to trigger a denial-of-service (DoS)
  condition in the Fireware Web UI by convincing an authenticated administrator
  into v…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-352
vendor: watchguard
product: fireware
affected:
  - 'fireware >= 2025.1, < 2026.2'
  - 'fireware >= 12.5, < 12.5.18'
  - 'fireware >= 11.8, < 11.12.4'
  - fireware = 11.12.4
  - 'fireware >= 12.0, < 12.12'
patched:
  - fireware 12.12
published: '2026-03-30'
updated: '2026-08-14'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-4315'
references:
  - url: 'https://psirt.watchguard.com/CVE-2026-4315'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
  - url: 'https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00006'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
tags:
  - nvd
epss: 0.00241
epssPercentile: 0.13588
ingestedAt: '2026-08-14T14:18:32.507Z'
---

## Overview

A Cross-Site Request Forgery (CSRF) vulnerability in the WatchGuard Fireware OS WebUI could allow a remote attacker to trigger a denial-of-service (DoS) condition in the Fireware Web UI by convincing an authenticated administrator into visiting a malicious web page.

## Affected

- `fireware >= 2025.1, < 2026.2`
- `fireware >= 12.5, < 12.5.18`
- `fireware >= 11.8, < 11.12.4`
- `fireware = 11.12.4`
- `fireware >= 12.0, < 12.12`

## Remediation

Upgrade past the affected range:

- `fireware 12.12`