High · published July 3, 2026
WatchGuard Fireware OS contains a firmware validation bypass when processing a backup image via the backup/restore feature. An authenticated administrator can exploit this vulnerability to install a tampered firmware image.
| Product | Versions | Fixed in |
|---|---|---|
| watchguard/fireware | ≥ 2025.1, < 2026.2.1 | 2026.2.1 |
| watchguard/fireware | ≥ 12.5, ≤ 12.5.18 | — |
| watchguard/fireware | ≥ 12.0, < 12.12.1 | 12.12.1 |
| watchguard/fireware | ≥ 11.0.0, < 11.12.4 | 11.12.4 |
| watchguard/fireware | all versions | — |
| watchguard/fireware | all versions | — |