CVE-2026-86104

HighCVSS 7.5/10Last modified Oct 6, 2026

Description

An uncontrolled resource consumption vulnerability in the Fireware OS login process (wgagent) allows a remote, unauthenticated attacker to cause a denial of service by sending a specially crafted request.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400 CWE-409 CWE-770

Affected software

Vendor	Product	Versions
WatchGuard	Fireware OS	>= 2026.3, < 2026.3.2; >= 2025.0, < 2026.2.3; >= 12.0, < 12.12.3
WatchGuard	Fireware OS	>= 12.0, < 12.5.21

References

https://psirt.watchguard.com/CVE-2026-86104Patch, Vendor Advisory

Timeline

Published: Sep 30, 2026
Last modified: Oct 6, 2026
NVD status: Analyzed

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