CVE-2025-9242

CRITICAL KEV NUCLEI

WatchGuard Fireware OS <12.11.3 - RCE

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2025-9242 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added November 12, 2025. EIP tracks 1 public exploit from researchers including watchtowrlabs. A Nuclei detection template is also available.

AI-analyzed exploit summary This repository contains a functional exploit PoC for CVE-2025-9242, an unauthenticated remote code execution vulnerability in WatchGuard Firebox's IKEv2 service. The script includes ROP chain construction, shellcode payload generation, and version detection to confirm vulnerability status.

Description

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS 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.This vulnerability affects Fireware OS 11.10.2 up to and including 11.12.4_Update1, 12.0 up to and including 12.11.3 and 2025.1.

Exploits (1)

github WORKING POC 11 stars
by watchtowrlabs · pythonremote
https://github.com/watchtowrlabs/watchTowr-vs-WatchGuard-CVE-2025-9242

This repository contains a functional exploit PoC for CVE-2025-9242, an unauthenticated remote code execution vulnerability in WatchGuard Firebox's IKEv2 service. The script includes ROP chain construction, shellcode payload generation, and version detection to confirm vulnerability status.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Complex
Reliability
Reliable
Target: WatchGuard Firebox (versions 2025.1, 12.x, 12.5.x, 12.3.1, 11.x)
No auth needed
Prerequisites: Network access to target's IKEv2 service (UDP port 500) · Vulnerable WatchGuard firmware version
devstral-2 · analyzed Feb 19, 2026 Full analysis →

Nuclei Templates (1)

WatchGuard IKEv2 Out-of-Bounds Write Vulnerability
CRITICALVERIFIEDby pussycat0x,DhiyaneshDK,watchTowr
Shodan: html:"Watchguard" html:"Authentication Server"

Scores

CVSS v3 9.8
EPSS 0.7859
EPSS Percentile 99.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable yes
Technical Impact total

Details

CISA KEV 2025-11-12
VulnCheck KEV 2025-10-21
ENISA EUVD EUVD-2025-29699
CWE
CWE-787
Status published
Products (2)
watchguard/fireware 2025.1
watchguard/fireware 11.10.2 - 12.11.4
Published Sep 17, 2025
KEV Added Nov 12, 2025
Tracked Since Feb 18, 2026