---
id: CVE-2026-121400
title: FreeRDP before 3.32.2 CPU Exhaustion via RDG Control Packet
summary: >-
  FreeRDP before 3.32.2 contains a denial-of-service vulnerability in
  rdg_process_control_packet that allows a malicious RD Gateway to exhaust
  client CPU by sending an incomplete keepalive control packet. Attackers
  completing the RDG tunne…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-835
vendor: FreeRDP
product: FreeRDP
affected:
  - FreeRDP < 3.32.2
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-03T17:51:54.414654Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T18:31:06.684Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121400'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-x4x6-2hrm-hvq9'
    label: GitHub Security Advisory (GHSA-x4x6-2hrm-hvq9)
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-before-3.32.2-cpu-exhaustion-via-rdg-control-packet
    label: >-
      VulnCheck Advisory: FreeRDP before 3.32.2 CPU Exhaustion via RDG Control
      Packet
tags:
  - cve.org
epss: 0.0031
epssPercentile: 0.24034
ingestedAt: '2026-11-05T20:33:06.359Z'
---

## Overview

FreeRDP before 3.32.2 contains a denial-of-service vulnerability in rdg_process_control_packet that allows a malicious RD Gateway to exhaust client CPU by sending an incomplete keepalive control packet. Attackers completing the RDG tunnel-open exchange then send an eight-byte header with packetLength 0xFFFF and withhold the body, causing an unbounded no-progress read loop that spins one client thread at full CPU.

## Affected

- `FreeRDP < 3.32.2`

## Remediation

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