CVE-2026-121964

High

Description

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductFreerdp

PublishedNov 4, 2026

First seenNov 4, 2026

Weakness typeCWE-122CWE-122

How to fix

Update

freerdp freerdp3.32.2 or later

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q82v-5wjg-6h57

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	v < 3.32.2	3.32.2

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