CVE-2026-121638WatchGuard AuthPoint Gateway Improper Certificate Validation Allows Man-in-the-Middle Attacks

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.

9.1 CRITICALEPSS 0.29%Not in KEVNVD: Deferred

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

OverviewCVSS details

9.1CRITICALCVSS 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 total

EPSS · FIRST, scored Nov 7

0.29%chance of exploitation in 30 days

Higher than 21.89% of CVEs

CVSS 4.0 · WatchGuard (CNA)

9.1Critical

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

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

NVD status: Deferred

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.1	CRITICAL	4.0WatchGuard (CNA)	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

Details

CVE ID: CVE-2026-121638
Status: Deferred
Assigner (CNA): WatchGuard
Published: Nov 4, 2026
Last modified: 2026-11-06 21:15 UTC
Weaknesses: CWE-295

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 10:44 UTC.