Firebox and Fireware OS
CVE-2026-13086: Fireware OS Stack-Based Buffer Overflow in Mobile Security epm Endpoint
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.
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) 2025.0 | 2026.2.2 or later |
| Fireware OS (Default) 12.0 | 12.12.2 or later |
| Fireware OS (Default) 2026.3 | 2026.3.1 or later |
| Fireware OS (T15/T35) 12.0 | 12.5.20 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Am I affected?
By default, the epm service is only reachable on Trusted interfaces on devices where the deprecated Mobile Security is enabled.
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.