CVE-2026-121637WatchGuard 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.

8.9 HIGHEPSS 0.26%Not in KEVNVD: Deferred

Last updated: 2026-11-06 21:15 UTC

OverviewCVSS details

8.9HIGHCVSS 4.0

Score source: WatchGuard (CNA)
NVD status: Deferred
Published: Nov 4, 2026
Assigner: WatchGuard

Affected

AuthPoint Authentication Gateway (WatchGuard)

Versions: 1.0 before 7.6.0
Fixed in: 7.6.0

Exploitation

Public exploit: None listed
CISA KEV: Not listed
KEV due date: —
SSVC: Exploitation none · Automatable no · Impact partial

EPSS · FIRST, scored Nov 7

0.26%chance of exploitation in 30 days

Higher than 18.39% of CVEs

CVSS 4.0 · WatchGuard (CNA)

8.9High

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

Attack vector: Network
Attack complexity: Low
Attack requirements: Present
Privileges required: None
User interaction: None
Confidentiality impact: None
Integrity impact: High
Availability impact: None
Confidentiality (other systems): None
Integrity (other systems): High
Availability (other systems): None

NVD status: Deferred

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
8.9	HIGH	4.0WatchGuard (CNA)	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

Details

CVE ID: CVE-2026-121637
Status: Deferred
Assigner (CNA): WatchGuard
Published: Nov 4, 2026
Last modified: 2026-11-06 21:15 UTC
Weaknesses: CWE-345

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 10:55 UTC.