CVE-2026-86101
Received Received - Intake

Improper Authorization in WatchGuard Fireware OS SAML Login

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: WatchGuard Technologies, Inc.

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.

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Meta Information

Published
2026-09-30
Last Modified
2026-09-30
Generated
2026-09-30
AI Q&A
2026-09-30
EPSS Evaluated
N/A
NVD
CVE-2026-86101
EUVD
EUVD-2026-89499

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
watchguard fireware_os From 2026.3 (inc) to 2026.3.2 (inc)
watchguard fireware_os From 2025.0 (inc) to 2026.2.3 (inc)
watchguard fireware_os From 12.0 (inc) to 12.12.3 (inc)
watchguard fireware_os From 12.0 (inc) to 12.5.21 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-285 The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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Executive Summary

This vulnerability is an improper authorization issue in WatchGuard Fireware OS's SAML login process. A remote, authenticated SAML user with only Access Portal access can exploit a specially crafted request to gain unauthorized Mobile VPN with SSL access.

Detection Guidance

Check Fireware OS versions for affected ranges (2026.3-2026.3.2, 2025.0-2026.2.3, 12.0-12.12.3, or T15/T35 models 12.0-12.5.21). Review SAML login logs for unusual Mobile VPN with SSL access attempts by Access Portal users.

Impact Analysis

An attacker could bypass intended access restrictions and gain unauthorized VPN access, potentially exposing internal network resources. This could lead to data breaches or unauthorized system access if exploited.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Organizations may face compliance violations if exploited.

Mitigation Strategies

Upgrade Fireware OS to patched versions (2026.3.2, 2026.2.3, 12.12.3, or 12.5.21). Disable Mobile VPN with SSL access for SAML users until patched. Monitor for unauthorized VPN access attempts.

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