CVE-2026-121637

WatchGuard AuthPoint Gateway Improper HMAC Validation in LDAP Authentication Callback Allows Forged Authentication Results

High 8.9 CVSS v4.0 › Published 2026-11-04Updated 2026-11-04

Summary #

An improper integrity validation vulnerability in WatchGuard AuthPoint Gateway's LDAP authentication callback allows a network attacker who has obtained a valid header signature to forge the authentication result and transaction identifier in the request body, resulting in unauthorized session outcomes.

Product status #

ProductAffectedNot affected
AuthPoint Authentication Gateway>= 1.0, < 7.6.0>= 7.6.0

Required Configuration for Exposure #

This vulnerability affects AtuhPoint Gateway deployments configured with an LDAP provider.

Weakness Type and Impact #

  • CWECWE-345Insufficient Verification of Data Authenticity
  • CAPECCAPEC-385Transaction or Event Tampering via Application API Manipulation

Exploitation Status #

WatchGuard is not aware of any exploitation of this vulnerability in the wild.

Solution #

AuthPoint Authentication Gateway 7.6.0

References #

    Credits #

    • WatchGuard AI Security Researchfinder