CVE-2026-13086

Fireware OS Stack-Based Buffer Overflow in Mobile Security epm Endpoint

State: Published
Severity: 9.3 Critical
Published: Aug 27, 2026
Updated: Sep 3, 2026
Reserved: Jun 23, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	WatchGuard

Weaknesses

Affected Products

Product	Versions
Fireware OSWatchGuard	2025.0 to before 2026.2.2Affected 12.0 to before 12.12.2Affected 2026.3 to before 2026.3.1Affected
Fireware OSWatchGuard	12.0 to before 12.5.20Affected

References

https://psirt.watchguard.com/CVE-2026-13086vendor-advisory

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