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Vulnerability1

CVE-2026-121640

Authentication Bypass by Capture-replay in WatchGuard AuthPoint Gateway

CVSS 4.0
9.1 critical
EPSS
—
Published
·
Modified
Analyze CVE-2026-121640 with Vani AIImpact, affected versions, exploitation status, mitigations and detection
AI analysisSummaries by Vani AI

An Authentication Bypass by Capture-replay flaw exists in WatchGuard AuthPoint Gateway. An attacker who has observed a legitimate request between AuthPoint Gateway components can replay it to perform unauthorized administrative actions, including disrupting authentication services. Affected are users of the WatchGuard AuthPoint Gateway.

What to do: Apply WatchGuard's update for CVE-2026-121640. No workaround or fixed version given.

ProductAffected
WatchGuard AuthPoint Gateway—
Estimated exposure
No basis for an estimate.

Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.

Description · NVD

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.

Weakness
CWE-294
Vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD CVE.org GitHub PoCs EPSS (—)

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