CVE-2025-12026: WatchGuard Fireware

High severity, CVSS 7.2. EPSS: 0.4% chance of exploitation in the next 30 days.

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS’s certificate request command could allow an authenticated privileged user to execute arbitrary code via specially crafted CLI commands.

Affected products

• WatchGuard Fireware: from 2025.1, before 2025.1.3 (fixed in 2025.1.3); from 12.0.0, before 12.11.5 (fixed in 12.11.5); from 12.5, before 12.5.14 (fixed in 12.5.14)

Published 2025-12-04. Last modified 2026-08-10.