CVE-2025-9242

WatchGuard Firebox iked Out of Bounds Write Vulnerability

State: Published
Severity: 9.3 Critical
Published: Sep 17, 2025
Updated: Aug 10, 2026
Reserved: Aug 20, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	WatchGuard

Weaknesses

CWE-787

Affected Products

Product	Versions
Fireware OSWatchGuard	11.0 through 11.12.4+541730Affected 12.0 to before 12.11.4Affected 2025.0 to before 2025.1.1Affected
Fireware OSWatchGuard	12.0 to before 12.3.1+722811Affected
Fireware OSWatchGuard	12.0 to before 12.5.13Affected

References

https://psirt.watchguard.com/CVE-2025-9242vendor-advisory
https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015vendor-advisory
https://github.com/watchtowrlabs/watchTowr-vs-WatchGuard-CVE-2025-9242/blob/main/watchTowr-vs-WatchGuard-CVE-2025-9242.pyexploit
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-9242government-resource

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