CVE-2026-91954: Freerdp

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

FreeRDP before 3.31.0 contains a null pointer dereference vulnerability in gdi_surface_bits when processing Surface Bits commands with NSCodec codec ID. A malicious RDP server can crash a FreeRDP client by sending a crafted Surface Bits command claiming to use NSCodec, even when the codec is disabled.

Affected products

• Freerdp Freerdp: before 3.31.0 (fixed in 3.31.0)

Published 2026-09-15. Last modified 2026-09-24.