CVE-2026-121638

WatchGuard AuthPoint Gateway Improper Certificate Validation Allows Man-in-the-Middle Attacks

Published Nov 4, 2026 CVSS 4.0 · 9.1 Critical EPSS < 1% KEV · Not listed
Description
An Improper Certificate Validation vulnerability in WatchGuard AuthPoint Gateway allows an attacker with an on-path network position to intercept and modify communications between the AuthPoint Gateway and local authentication providers.

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': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An Improper Certificate Validation vulnerability in WatchGuard AuthPoint Gateway allows an attacker with an on-path network position to intercept and modify communications between the AuthPoint Gateway and local authentication providers.
Title WatchGuard AuthPoint Gateway Improper Certificate Validation Allows Man-in-the-Middle Attacks
First Time appeared Watchguard
Watchguard authpoint Authentication Gateway
Weaknesses CWE-295
CPEs cpe:2.3:a:watchguard:authpoint_authentication_gateway:*:*:*:*:*:*:*:*
Vendors & Products Watchguard
Watchguard authpoint Authentication Gateway
References
Metrics cvssV4_0

{'score': 9.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
WatchGuard
Published
Updated
Nov 4, 2026, 6:20 PM
Reserved
Nov 3, 2026, 5:27 PM
Status
Deferred
Published
Nov 4, 2026, 3:17 PM
Modified
Nov 6, 2026, 9:15 PM