---
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: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-94
  - CWE-295
  - CWE-829
vendor: watchguard
product: fireware
affected:
  - 'fireware >= 12.0, < 12.5.21'
  - 'fireware >= 12.12, < 12.12.3'
  - 'fireware >= 2025.0, < 2026.2.3'
  - 'fireware >= 2026.3, < 2026.3.2'
patched:
  - fireware 2026.3.2
published: '2026-09-30'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T20:39:54.950'
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
epss: 0.00469
epssPercentile: 0.4039
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-01T03:55:39.882228Z'
scores:
  nvd: 9.8
  cna: 9.2
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.

## Affected

- `fireware >= 12.0, < 12.5.21`
- `fireware >= 12.12, < 12.12.3`
- `fireware >= 2025.0, < 2026.2.3`
- `fireware >= 2026.3, < 2026.3.2`

## Remediation

Upgrade past the affected range:

- `fireware 2026.3.2`