CVE-2025-9242

WatchGuard Firebox iked Out of Bounds Write Vulnerability

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.

Affected

WatchGuard · Fireware OS

CVSS v4.0 CNA

9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

91.80% chance of exploitation in the next 30 days, 100th percentile

CISA KEV

added 2025-11-12

Nuclei

critical

Published

2025-09-17

Updated

2026-08-10

Proof-of-concept exploits (1)

• watchtowrlabs/watchTowr-vs-WatchGuard-CVE-2025-924213★ · 2026-03-03

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/code/cves/2025/CVE-2025-9242.yaml

Security advisories

• https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015

References

• CVE Record
• NVD entry