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CVE-2026-121639— WatchGuard AuthPoint Gateway Improper Authentication Allows Unauthenticated Denial of Service

Quick assessment

Affected
WatchGuard AuthPoint Authentication Gateway
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WatchGuard AuthPoint Gateway 中存在一个关键功能缺少身份验证的漏洞，允许拥有网络访问权限的远程未认证攻击者破坏身份验证服务，并删除本地目录同步配置。

CVSS 9.2 · Critical

Possible ATT&CK Techniques 1 AI

T1562.004
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I. Basic Information for CVE-2026-121639

Vulnerability Information
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Vulnerability Title
WatchGuard AuthPoint Gateway Improper Authentication Allows Unauthenticated Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
A Missing Authentication for Critical Function vulnerability in WatchGuard AuthPoint Gateway allows a remote unauthenticated attacker with network access to the AuthPoint Gateway host to disrupt authentication services and delete the local directory synchronization configuration.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加检查的返回值
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WatchGuard AuthPoint Authentication Gateway 1.0 ~ 7.6.0 -

II. Public POCs for CVE-2026-121639

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-121639

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Other References for CVE-2026-121639 (1)

Same Patch Batch · WatchGuard · 2026-11-04 · 4 CVEs total

CVE-2026-121640 9.1 CRITICAL WatchGuard AuthPoint Gateway Capture-replay Allows Unauthorized Administrative Actions
CVE-2026-121638 9.1 CRITICAL WatchGuard AuthPoint Gateway Improper Certificate Validation Allows Man-in-the-Middle Atta
CVE-2026-121637 8.9 HIGH WatchGuard AuthPoint Gateway Improper HMAC Validation in LDAP Authentication Callback Allo

IV. Related Vulnerabilities

Same product: AuthPoint Authentication Gateway
Same vendor: WatchGuard
Same weakness: CWE-252