---
id: CVE-2026-113881
title: >-
  Fireware OS Stack Buffer Overflow in VPN Network Access Enforcement Allows
  Unprivileged Code Execution
summary: >-
  A stack-based buffer overflow vulnerability in Fireware OS's VPN Network
  Access Enforcement process allows an authenticated mobile VPN user to create a
  denial of service condition and potentially execute arbitrary code as an
  unprivileged…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-121
  - CWE-129
vendor: WatchGuard
product: Fireware OS
affected:
  - fireware_os >= 2025.1 < 2026.4
  - fireware_os >= 12.9 < 12.12.4
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T15:52:28.229Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113881'
references:
  - url: 'https://psirt.watchguard.com/CVE-2026-113881'
tags:
  - cve.org
ingestedAt: '2026-10-27T16:11:59.479Z'
---

## Overview

A stack-based buffer overflow vulnerability in Fireware OS's VPN Network Access Enforcement process allows an authenticated mobile VPN user to create a denial of service condition and potentially execute arbitrary code as an unprivileged process by sending a specially crafted request.

## Affected

- `fireware_os >= 2025.1 < 2026.4`
- `fireware_os >= 12.9 < 12.12.4`

## Remediation

Fireware OS 2026.4, Fireware OS 12.12.4