Quick answers
- Is CVE-2026-121401 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-121401 being exploited in the wild.
- How severe is CVE-2026-121401?
- Medium severity, with a CVSS score of 4.3, published 3 November 2026.
- Which products and versions are affected?
- FreeRDP before 3.32.2.
- Is there a fix for CVE-2026-121401?
- 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-2026-121401 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-121401?
- 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
A null-pointer dereference in rdg_process_packet() occurs when PKT_TYPE_EXTENDED_AUTH_MSG is dispatched without verifying the negotiated mode or presence of an auth context. When GatewayHttpExtAuthSspiNtlm is disabled (the default), the HTTP authentication context is freed before tunnel packets are received. An attacker on a malicious RD Gateway can trigger this by sending the extended-auth packet immediately after WebSocket upgrade, causing credssp_auth_is_complete(NULL) to read from a null pointer.
Affected products
- FreeRDP FreeRDP before 3.32.2
Timeline
- 2026-10-19: disclosed
- 2026-11-03: advisory