---
id: CVE-2026-86101
title: >-
  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 c…
summary: >-
  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 c…
severity: high
cvss: 7.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N'
cwe:
  - CWE-285
  - CWE-863
vendor: WatchGuard
product: Fireware OS
affected:
  - fireware_os >= 2026.3 < 2026.3.2
  - fireware_os >= 2025.0 < 2026.2.3
  - fireware_os >= 12.0 < 12.12.3
  - fireware_os >= 12.0 < 12.5.21
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T00:16:36.283'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86101'
references:
  - url: 'https://psirt.watchguard.com/CVE-2026-86101'
    label: 5d1c2695-1a31-4499-88ae-e847036fd7e3
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-29T23:52:50.549Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.