Paper/Archive/CVE-2026-121638

CVE-2026-121638

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

CVSS 9.1

critical.is priorityof 100

CVSS 9.1 (CNA)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 No EPSS score.000 × 200.0 No public exploit+100.0 SSVC exploitation: unknown+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

AuthPoint Authentication Gateway1.0 – < 7.6.07.6.0CNA

Scores by source

WatchGuard (CNA)9.1CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References

advisorypsirt.watchguard.com/CVE-2026-121638