Advisoriesby IbisWatchGuard TechnologiesCVE-2026-13086
WatchGuard Technologies Fireware OS: stack buffer overflow
Fix: upgrade to 2026.2.2 or later (4 fixed versions below)
A stack-based buffer overflow in the epm (Endpoint Protection Manager) service used by the deprecated Mobile Security feature in WatchGuard Fireware OS allows an unauthenticated remote attacker to execute arbitrary code.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Fireware OS Product | >= 2025.0, < 2026.2.2 | 2026.2.2 |
| >= 12.0, < 12.12.2 | 12.12.2 | |
| >= 2026.3, < 2026.3.1 | 2026.3.1 | |
| >= 12.0, < 12.5.20 | 12.5.20 |