CVE-2026-86136: A missing authorization vulnerability in the wgagent management daemon's session initialization function allows an authenticated, low-privileged user…

PriorityP353high8.1CVSS 3.1

AVNACLPRLUINSUCHINAH

EPSS

0.27%

16.8th percentile

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

8 ranges

Vendor	Product	Version range	Fixed in
watchguard	fireware	>= 12.0 < 12.5.21	12.5.21
watchguard	fireware	>= 12.12 < 12.12.3	12.12.3
watchguard	fireware	>= 2025.0 < 2026.2.3	2026.2.3
watchguard	fireware	>= 2026.3 < 2026.3.2	2026.3.2
watchguard	fireware_os	>= 12.0 < 12.12.3	12.12.3
watchguard	fireware_os	>= 12.0 < 12.5.21	12.5.21
watchguard	fireware_os	>= 2025.0 < 2026.2.3	2026.2.3
watchguard	fireware_os	>= 2026.0 < 2026.3.2	2026.3.2

CVSS provenance

nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

nvdv4.07.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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