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CVE-2026-121640— WatchGuard AuthPoint Gateway Capture-replay Allows Unauthorized Administrative Actions

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 存在通过捕获 - 重放实现的认证绕过漏洞。攻击者若已观察到 AuthPoint Gateway 组件之间的合法请求，即可重放该请求并执行未经授权的管理操作，包括中断认证服务。

CVSS 9.1 · Critical
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I. Basic Information for CVE-2026-121640

Vulnerability Information
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Vulnerability Title
WatchGuard AuthPoint Gateway Capture-replay Allows Unauthorized Administrative Actions
Source: CVE Program / CVE List V5
Vulnerability Description
An Authentication Bypass by Capture-replay vulnerability in WatchGuard AuthPoint Gateway allows an attacker who has observed a legitimate request between AuthPoint Gateway components to replay it and perform unauthorized administrative actions, including disrupting authentication services.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用捕获-重放进行的认证绕过
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-2026-121640

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-121640

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Other References for CVE-2026-121640 (1)

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

CVE-2026-121639 9.2 CRITICAL WatchGuard AuthPoint Gateway Improper Authentication Allows Unauthenticated Denial of Serv
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-294