---
id: CVE-2026-121951
title: FreeRDP 3.0.0 before 3.32.2 Denial of Service via Slow-Path Input Event
summary: >-
  FreeRDP 3.0.0 before 3.32.2 server-side RDP peer input parsing skips the
  six-byte body of a slow-path input event with an unknown message type without
  checking it lies within the packet's declared length, causing a WinPR stream
  assertion…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-617
vendor: FreeRDP
product: FreeRDP
affected:
  - FreeRDP >= 3.0.0 < 3.32.2
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-04T18:39:42.219159Z'
exploitAvailable: true
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T18:40:11.321Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121951'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4qq4-qwxq-49m8'
    label: GitHub Security Advisory (GHSA-4qq4-qwxq-49m8)
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.2-denial-of-service-via-slow-path-input-event
    label: >-
      VulnCheck Advisory: FreeRDP 3.0.0 before 3.32.2 Denial of Service via
      Slow-Path Input Event
tags:
  - cve.org
  - exploit-available
ingestedAt: '2026-11-05T21:36:00.493Z'
epss: 0.00423
epssPercentile: 0.36834
---

## Overview

FreeRDP 3.0.0 before 3.32.2 server-side RDP peer input parsing skips the six-byte body of a slow-path input event with an unknown message type without checking it lies within the packet's declared length, causing a WinPR stream assertion failure. A remote RDP client with an active session can send a truncated unknown input event to abort assertion-enabled server processes, causing denial of service.

## Affected

- `FreeRDP >= 3.0.0 < 3.32.2`

## Remediation

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