CVE-2026-121637

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

Published Nov 4, 2026 CVSS 4.0 · 8.9 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Solution

AuthPoint Authentication Gateway 7.6.0

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title WatchGuard AuthPoint Gateway Improper HMAC Validation in LDAP Authentication Callback Allows Forged Authentication Results
First Time appeared Watchguard
Watchguard authpoint Authentication Gateway
Weaknesses CWE-345
CPEs cpe:2.3:a:watchguard:authpoint_authentication_gateway:*:*:*:*:*:*:*:*
Vendors & Products Watchguard
Watchguard authpoint Authentication Gateway
References
Metrics cvssV4_0

{'score': 8.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
WatchGuard
Published
Updated
Nov 4, 2026, 6:20 PM
Reserved
Nov 3, 2026, 5:26 PM
Status
Deferred
Published
Nov 4, 2026, 3:17 PM
Modified
Nov 6, 2026, 9:15 PM