Is CVE-2026-121405 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-121405?

CVE-2026-121405 has a CVSS v3 severity of MEDIUM (4.3).

What does CVE-2026-121405 affect?

CVE-2026-121405 affects freerdp.

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CVE-2026-121405

Monitor on ThreatCluster

Description

FreeRDP before 3.32.2 fails to cap the OutputBufferLength in serial device-control IRP requests, allowing malicious servers to trigger excessive memory allocation. Attackers running a server with serial redirection can send an IRP_MJ_DEVICE_CONTROL request with IOCTL_USBPRINT_GET_1284_ID and a near-maximum length to exhaust client memory.