CVE-2026-121964 PUBLISHED

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.

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• GitHub Security Advisory (GHSA-q82v-5wjg-6h57)
• VulnCheck Advisory: FreeRDP before 3.32.2 Heap Buffer Overflow via rpc_client_recv_fragment

• Heap-based Buffer Overflow CWE