---
id: CVE-2025-9242
title: >-
  An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked
  process may allow a remote unauthenticated attacker to execute arbitrary code
summary: >-
  An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked
  process may allow a remote unauthenticated attacker to execute arbitrary code.
  This vulnerability affects both the mobile user VPN with IKEv2 and the branch
  office V…
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-787
vendor: watchguard
product: fireware
affected:
  - 'fireware >= 11.10.2, < 12.11.4'
  - 'fireware >= 11.10.2, < 12.5.13'
  - fireware = 2025.1
patched:
  - fireware 12.5.13
published: '2025-09-17'
updated: '2026-08-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-9242'
references:
  - url: 'https://psirt.watchguard.com/CVE-2025-9242'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
  - url: 'https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
  - url: >-
      https://github.com/watchtowrlabs/watchTowr-vs-WatchGuard-CVE-2025-9242/blob/main/watchTowr-vs-WatchGuard-CVE-2025-9242.py
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-9242
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
  - exploit-available
epss: 0.913
epssPercentile: 0.99806
kev: true
kevDateAdded: '2025-11-12'
kevDueDate: '2025-12-03'
kevRansomware: false
exploited: true
ingestedAt: '2026-08-11T16:47:03.726Z'
exploits:
  github: 2
  githubRepos:
    - 'https://github.com/watchtowrlabs/watchTowr-vs-WatchGuard-CVE-2025-9242'
    - >-
      https://github.com/UnusualGiraffe/WatchGuard-CVE-2025-9242-PoC-and-Mass-Scanner
  checkedAt: '2026-09-23T07:13:38.597Z'
exploitAvailable: true
---

## Overview

An Out-of-bounds Write vulnerability in the WatchGuard Fireware OS iked process may allow a remote unauthenticated attacker to execute arbitrary code. This vulnerability affects both the mobile user VPN with IKEv2 and the branch office VPN using IKEv2 when configured with a dynamic gateway peer.
If the Firebox was previously configured with the mobile user VPN with IKEv2 or a branch office VPN using IKEv2 to a dynamic gateway peer, and both of those configurations have since been deleted, that Firebox may still be vulnerable if a branch office VPN to a static gateway peer is still configured.

## Affected

- `fireware >= 11.10.2, < 12.11.4`
- `fireware >= 11.10.2, < 12.5.13`
- `fireware = 2025.1`

## Remediation

Upgrade past the affected range:

- `fireware 12.5.13`