---
id: CVE-2026-86131
title: >-
  A code injection vulnerability in WatchGuard Fireware OS's BOVPN Over TLS
  client configuration handling allows an attacker who controls the remote VPN
  server to execute arbitrary commands as root on the connecting Firebox.
summary: >-
  A code injection vulnerability in WatchGuard Fireware OS's BOVPN Over TLS
  client configuration handling allows an attacker who controls the remote VPN
  server to execute arbitrary commands as root on the connecting Firebox.
severity: critical
cvss: 9.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-94
  - CWE-295
  - CWE-829
vendor: WatchGuard
product: Fireware OS
affected:
  - fireware_os >= 2026.3 < 2026.3.2
  - fireware_os >= 2025.0 < 2026.2.3
  - fireware_os >= 12.0 < 12.12.3
  - fireware_os >= 12.0 < 12.5.21
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T00:16:36.817'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86131'
references:
  - url: 'https://psirt.watchguard.com/CVE-2026-86131'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-29T23:52:50.544Z'
---

## Overview

A code injection vulnerability in WatchGuard Fireware OS's BOVPN Over TLS client configuration handling allows an attacker who controls the remote VPN server to execute arbitrary commands as root on the connecting Firebox.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.