---
id: CVE-2026-109253
title: >-
  FreeRDP from 3.9.0 before 3.32.0 contains an out-of-bounds read vulnerability
  in the RDPEAR NDR scalar readers, which check value length before consuming
  alignment padding
summary: >-
  FreeRDP from 3.9.0 before 3.32.0 contains an out-of-bounds read vulnerability
  in the RDPEAR NDR scalar readers, which check value length before consuming
  alignment padding. Malicious or compromised RDP servers can send crafted
  unaligned …
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-125
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:16.677'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109253'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6rj3-rf6g-3vw5'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-3.9.0-before-3.32.0-rdpear-ndr-scalar-out-of-bounds-read
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.177Z'
---

## Overview

FreeRDP from 3.9.0 before 3.32.0 contains an out-of-bounds read vulnerability in the RDPEAR NDR scalar readers, which check value length before consuming alignment padding. Malicious or compromised RDP servers can send crafted unaligned RDPEAR payloads, such as CreateApReqAuthenticatorReq messages, to clients using Remote Credential Guard, causing over-reads and potentially crashing the client process.

## Remediation

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