Critical [CVE-2026-13086] Fireware OS Stack-Based Buffer Overflow in Mobile Security epm Endpoint
This critical-severity WatchGuard advisory covers CVE-2026-13086 affecting Fireware OS.
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Summary
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.
- Fireware OS 2025.0 before 2026.2.2
- Fireware OS 12.0 before 12.12.2
- Fireware OS 12.0 before 12.5.20
Official advisory · high-confidence parse· fetched 53 minutes ago·verify at source
- 2026.2.2
- 12.12.2
- 12.5.20
Official advisory · high-confidence parse· fetched 53 minutes ago·verify at source
Mitigation
Upgrade to a fixed release: 2026.2.2, 12.12.2, 12.5.20. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 53 minutes ago·verify at source
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