CVE-2026-78008

Fireware OS Authenticated Buffer Overflow in wgagent

State: Published
Severity: 8.6 High
Published: Aug 27, 2026
Updated: Sep 3, 2026
Reserved: Aug 21, 2026

Description

A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.

Scores

CVSS	Score	Vector	Source
4.0	8.6 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	WatchGuard

Weaknesses

CWE-787

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-2026-78008vendor-advisory

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