CVE-2026-91964
FreeRDP versions before 3.31.0 contain a heap-based buffer overflow in nego_send_negotiation_request when processing Server Redirection PDU messages with attacker-controlled LoadBalanceInfo fields. A malicious RDP server can trigger the overflow by sending an arbitrary-length field that gets written to a fixed 512-byte buffer without validation, causing client crashes or potential code execution when chained with memory disclosure.
- Published Sep 15, 2026
- CVSS 8.7 high
- 0.6% chance of exploitation in the next 30 days (EPSS)
- A fix is available