FreeRDP before 3.32.2 contains a denial of service vulnerability in the shadow server that allows authenticated RDP clients to spin server threads by sending zero-length drdynvc DATA PDUs. Attackers can send empty DATA messages on opened audin or rdpgfx channels, so that FreeRDP_WTSVirtualChannelRead never consumes them, consuming full CPU cores until disconnect.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 03 Nov 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 03 Nov 2026 14:45:00 +0000

Type Values Removed Values Added
Description FreeRDP before 3.32.2 contains a denial of service vulnerability in the shadow server that allows authenticated RDP clients to spin server threads by sending zero-length drdynvc DATA PDUs. Attackers can send empty DATA messages on opened audin or rdpgfx channels, so that FreeRDP_WTSVirtualChannelRead never consumes them, consuming full CPU cores until disconnect.
Title FreeRDP before 3.32.2 Shadow Server CPU Exhaustion via Zero-Length DVC DATA
First Time appeared Freerdp
Freerdp freerdp
Weaknesses CWE-400
CPEs cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
Vendors & Products Freerdp
Freerdp freerdp
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-03T18:30:55.780Z

Reserved: 2026-11-03T12:27:30.908Z

Link: CVE-2026-121404

cve-icon Vulnrichment

Updated: 2026-11-03T17:23:01.879Z

cve-icon NVD

Status : Analyzed

Published: 2026-11-03T15:17:28.870

Modified: 2026-11-03T19:18:02.047

Link: CVE-2026-121404

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-03T17:45:15Z

Weaknesses