CVE-2026-121964

FreeRDP before 3.32.2 contains a heap-based buffer overflow in the RD Gateway RPC client, where rpc client recv fragment writes BIND ACK and ALTER CONTEXT RESP fragments into a persistent PDU stream after checking only total capacity rather than remaining capacity from the current stream position. A malicious or compromised RD Gateway can send crafted RPC fragments with manipulated alloc hint and frag length values to overwrite client heap memory with attacker-controlled data, causing a crash or potentially arbitrary code execution.