Is CVE-2026-121401 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-121401?

CVE-2026-121401 has a CVSS v3 severity of MEDIUM (4.3).

What does CVE-2026-121401 affect?

CVE-2026-121401 affects freerdp.

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CVE-2026-121401

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Description

FreeRDP before 3.32.2 contains a denial of service vulnerability where rdg_process_packet dispatches a PKT_TYPE_EXTENDED_AUTH_MSG without verifying negotiated mode or auth context. A malicious or compromised RD Gateway can send the extended-auth packet before tunnel authentication, triggering a null-pointer dereference that crashes the client.