Advisoriesby IbisWatchGuard TechnologiesCVE-2026-8247
WatchGuard Technologies Fireware OS: out-of-bounds write
Fix: upgrade to 2026.2.1 or later (4 fixed versions below)
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Fireware OS Product | >= 2025.1, < 2026.2.1 | 2026.2.1 |
| >= 12.0, < 12.12.1 | 12.12.1 | |
| <= 11.0 | No fix yet | |
| >= 12.0, < 12.11.9 | 12.11.9 | |
| >= 12.0, < 12.5.19 | 12.5.19 |