Vulnerability Details CVE-2026-91961
FreeRDP before 3.31.0 contains a denial-of-service vulnerability in the URBDRC control-transfer request path that fails to validate OutputBufferSize before forwarding to the libusb backend. A malicious RDP server can send a control-transfer request with OutputBufferSize set to 65536, triggering a reachable assertion that terminates the client process.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 28.2%
CVSS Severity
CVSS v3 Score 6.5