CVE-2026-8247#
WatchGuard Firebox admd Out of Bounds Write Vulnerability
Summary #
An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the same local network segment to execute arbitrary code.
This vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2.
Product status #
| Product | Affected | Not affected |
|---|---|---|
| Fireware OS | ||
| Default | >= 2025.1, < 2026.2.1, >= 12.0, < 12.12.1, >= 11.0 | >= 2026.2.1, >= 12.12.1 |
| T15/T35 | >= 12.0, < 12.5.19 | >= 12.5.19 |
| EUCC | >= 12.0, < 12.11.9 | >= 12.11.9 |
Weakness Type and Impact #
Exploitation Status #
WatchGuard is not aware of any exploitation of this vulnerability in the wild.
Solution #
Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.5.19, Fireware OS 12.11.9
References #
Credits #
- Xander Mackenzie | @thetrueartist working with TrendAI Zero Day Initiativefinder