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OpenAdvisories
High · 7.1 CVE-2026-86136 EUVD-2026-89491GHSA-34hp-73hm-xf3h

Fireware OS Missing Authorization in wgagent Management API Allows Denial of Service - Variant A

Published Sep 29, 2026 · Updated Sep 30, 2026 · Assigned by WatchGuard

Description

A missing authorization vulnerability in the wgagent management daemon's session initialization function allows an authenticated, low-privileged user (including a read-only or guest administrator account) to crash the wgagent process and read arbitrary files accessible to the daemon by submitting a specially crafted management API request.

Affected products

VendorProductAffectedFixed
WatchGuard Fireware OS 2026.0 – < 2026.3.2, 2025.0 – < 2026.2.3, 12.0 – < 12.12.3, 12.0 – < 12.5.21 2026.3.2

Advisories 2

References