---
id: CVE-2026-121407
title: FreeRDP before 3.32.2 Shadow Server Denial of Service via remdesk Channel
summary: >-
  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
  remdes…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-20
vendor: FreeRDP
product: FreeRDP
affected:
  - FreeRDP < 3.32.2
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T14:28:08.104Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121407'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-x8vp-ff7m-294g'
    label: GitHub Security Advisory (GHSA-x8vp-ff7m-294g)
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-before-3.32.2-shadow-server-denial-of-service-via-remdesk-channel
    label: >-
      VulnCheck Advisory: FreeRDP before 3.32.2 Shadow Server Denial of Service
      via remdesk Channel
tags:
  - cve.org
epss: 0.00314
epssPercentile: 0.24461
ingestedAt: '2026-11-05T19:30:42.963Z'
---

## Overview

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.

## Affected

- `FreeRDP < 3.32.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.