PatchTheCVECVE-2026-121407: FreeRDP before 3.32.2 contains a denial of service vulnerability in the shadow server's remdesk_server_thread
CVE-2026-121407 is a medium-severity flaw (CVSS 6.5) affecting freerdp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
FreeRDP before 3.32.2 contains a denial of service vulnerability in the shadow server's remdesk_server_thread that allows authenticated clients to crash the process via an inverted PDU length check. Attackers can send an 8192-byte remdesk payload declaring an eight-byte PDU length to trigger a fatal Stream_Seek assertion, aborting the server and dropping sessions.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | n/a |
| CISA exploited list | No |
| Weakness | CWE-20 |
| Published | 2026-11-03 |
| Last modified | 2026-11-03 |
Last updated 2026-11-03 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Advisories and coverage
Research and news
- VulDB Recent Entries: CVE-2026-121407 | FreeRDP up to 3.32.1 Shadow Server remdesk_server_thread denial of service 2026-11-03
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-121407?
freerdp: upgrade to 3.32.2. Exact commands for each OS are on this page.
Is CVE-2026-121407 being exploited?
CVE-2026-121407 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-121407 affect?
CVE-2026-121407 affects freerdp. Severity is medium (CVSS 6.5). FreeRDP before 3.32.2 contains a denial of service vulnerability in the shadow server's remdesk_server_thread that allows authenticated clients to crash the process via an inverted PDU length check. Attackers can send an 8192-byte remdesk p
How urgent is CVE-2026-121407?
Priority 23/100. No elevated risk signals yet.
Related CVEs
- CVE-2026-121409 MEDIUM 5.9 UPGRADE FreeRDP before 3.32.2 contains a denial of service vulnerability that allows malicious servers or unauthentica
- CVE-2026-121405 MEDIUM 4.3 UPGRADE FreeRDP before 3.32.2 fails to cap the OutputBufferLength in serial device-control IRP requests, allowing mali
- CVE-2026-121401 MEDIUM 4.3 UPGRADE FreeRDP before 3.32.2 contains a denial of service vulnerability where rdg_process_packet dispatches a PKT_TYP
- CVE-2026-121397 MEDIUM 4.3 UPGRADE FreeRDP before 3.32.2 contains a heap buffer over-read vulnerability in save_png_to_buffer() that allows malic
- CVE-2026-121398 MEDIUM 5.9 UPGRADE FreeRDP before 3.32.2 contains a cross-thread use-after-free vulnerability in the freerdp-proxy dyn-channel-du