Quick answers
- Is CVE-2026-121964 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-121964 being exploited in the wild.
- How severe is CVE-2026-121964?
- High severity, with a CVSS score of 7.5, published 4 November 2026.
- Which products and versions are affected?
- FreeRDP before 3.32.2.
- Is there a fix for CVE-2026-121964?
- Yes: fixed in 3.32.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-121964 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-121964?
- Check whether you run FreeRDP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 3.32.2
Technical details
The vulnerability is a heap-based buffer overflow in the rpc_client_recv_fragment function where BIND_ACK and ALTER_CONTEXT_RESP fragments are written to a persistent PDU stream. The function checks only total buffer capacity rather than remaining capacity from the current stream position, allowing a malicious RD Gateway to send crafted fragments with manipulated alloc_hint and frag_length values to overwrite heap memory. The vulnerability requires network access to an RD Gateway endpoint but no authentication or user interaction beyond initiating a connection.
Affected products
- FreeRDP FreeRDP before 3.32.2
Timeline
- 2026-10-20: disclosed
- 2026-11-04: advisory