---
id: CVE-2026-109680
title: >-
  FreeRDP 3.18.0 before 3.32.0 has a heap-based out-of-bounds write in
  freerdp_interruptible_get_line, which shrinks the buffer to 32 bytes while
  keeping a pre-filled suggested username's length as its write offset
summary: >-
  FreeRDP 3.18.0 before 3.32.0 has a heap-based out-of-bounds write in
  freerdp_interruptible_get_line, which shrinks the buffer to 32 bytes while
  keeping a pre-filled suggested username's length as its write offset. A
  malicious or compromi…
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-787
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T14:17:31.367'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109680'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4ww8-3vqm-jgcf'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-3.18.0-before-3.32.0-heap-out-of-bounds-write-via-arm-redirected-username
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-13T14:29:01.848Z'
---

## Overview

FreeRDP 3.18.0 before 3.32.0 has a heap-based out-of-bounds write in freerdp_interruptible_get_line, which shrinks the buffer to 32 bytes while keeping a pre-filled suggested username's length as its write offset. A malicious or compromised ARM routing service can return a long redirectedUsername that reaches the CLI credential prompt, crashing the client when the user types input.

## Remediation

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