Firebox and Fireware OS
CVE-2026-3344: WatchGuard Firebox System Integrity Check Bypass
A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS filesystem integrity check and maintain limited persistence via a maliciously-crafted firmware update package.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Fireware OS (Default) 2025.1 | 2026.1.2 or later |
| Fireware OS (Default) 12.0 | 12.11.8 or later |
| Fireware OS (T15/T35) 12.0 | 12.5.17 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS filesystem integrity check and maintain limited persistence via a maliciously-crafted firmware update package.
Exploitation
WatchGuard is not aware of any exploitation of this issue in the wild.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.