CVE-2026-91963: Freerdp

Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days.

FreeRDP versions before 3.31.0 contain an uninitialized heap memory disclosure vulnerability in the urbdrc USB redirection channel. A malicious RDP server can induce failing USB transfers to read uninitialized heap memory from the client, defeating ASLR and enabling remote code execution when chained with memory corruption vulnerabilities.

Affected products

• Freerdp Freerdp: from 2.0.0, before 3.31.0 (fixed in 3.31.0)

Published 2026-09-15. Last modified 2026-09-23.