CVE-2026-121637
WatchGuard AuthPoint Gateway Improper HMAC Validation in LDAP Authentication Callback Allows Forged Authentication Results
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.
Fixes and workarounds
Fix
AuthPoint Authentication Gateway 7.6.0
Source: CNA: WatchGuardAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| AuthPoint Authentication Gateway WatchGuard |
≥ 1.0; < 7.6.0 (affected, semver)
Other versions: unaffected |
CNA: WatchGuard |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.9 high |
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 | CNA: WatchGuard |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://psirt.watchguard.com/CVE-2026-121637CNA: WatchGuard · vendor-advisory
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