CVE-2026-86101

Medium

Description

An improper authorization vulnerability in WatchGuard Fireware OS's SAML login process allows a remote, authenticated SAML user with access only to the Access Portal to obtain unauthorized Mobile VPN with SSL access through a specially crafted request.

SeverityMedium

CVSS6.5

Exploit probability—

ProductWatchguard Fireware

PublishedSep 30, 2026

First seenSep 30, 2026

Weakness typeCWE-285CWE-285 CWE-863Incorrect authorization

How to fix

Update

watchguard fireware12.5.21, 12.12.3, 2026.2.3, 2026.3.2 or later

Vendor advisories

psirt.watchguard.com/CVE-2026-86101

Affected products

Product	Affected versions	Fixed in
watchguard fireware	12.0 ≤ v < 12.5.21, 12.12 ≤ v < 12.12.3, 2025.0 ≤ v < 2026.2.3, 2026.3 ≤ v < 2026.3.2	12.5.21, 12.12.3, 2026.2.3, 2026.3.2

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