CVE-2025-9242

WatchGuard Fireware OS

Published 17 Sept 2025 · updated 10 Aug 2026 · Analyzed

9.3 Critical · CVSS 4.0, CNA

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 12 Nov 2025, with a remediation deadline of 3 Dec 2025 for US federal agencies.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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.

References