Firebox and Fireware OS
CVE-2025-12026: WatchGuard Firebox Authenticated Out of Bounds Write in certd
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.
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 | 2025.1.3 or later |
| Fireware OS (Default) 12.0 to 12.11.5 | Upgrade past 12.11.5; see the advisory |
| Fireware OS (T15/T35) 12.0 | 12.5.14 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Exploitation
WatchGuard is not aware of any exploitation of this vulnerability in the wild.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.