CVE-2026-91951: Freerdp

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

FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in the urbdrc client channel's urb_send_current_frame_number_result() function. A malicious RDP server can send a crafted 28-byte USB redirection message to trigger a 4-byte write past the allocated 16-byte buffer, causing denial of service when verbose asserts are enabled.

Affected products

• Freerdp Freerdp: from 3.14.0, before 3.31.0 (fixed in 3.31.0)

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