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VULNERABILITIES

CVE-2026-121404 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-fqcj-rwww-2498 [email protected]Vendor Advisory
https://www.vulncheck.com/advisories/freerdp-before-3.32.2-shadow-server-cpu-exhaustion-via-zero-length-dvc-data [email protected]Third Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-400Uncontrolled Resource Consumption[email protected]

Affected Products

ProductVersions
freerdp freerdp
< 3.32.2

CPE

  • cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-121404
NVD Published Date:
Nov 3, 2026
NVD Last Modified:
Nov 3, 2026
Source:
[email protected]
CVE-2026-121404 Details - Not Deferred