---
id: CVE-2026-92208
title: NoMachine mDNS Heap-based Buffer Overflow Remote Code Execution Vulnerability
summary: >-
  NoMachine mDNS Heap-based Buffer Overflow Remote Code Execution Vulnerability.
  This vulnerability allows network-adjacent attackers to execute arbitrary code
  on affected installations of NoMachine. Authentication is not required to
  explo…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-122
vendor: NoMachine
product: NoMachine
affected:
  - NoMachine 9.8.2_1
exploitAvailable: true
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T17:16:04.507Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-92208'
references:
  - url: 'https://www.zerodayinitiative.com/advisories/ZDI-26-710/'
    label: ZDI-26-710
tags:
  - cve.org
  - exploit-available
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/do4choo/CVE-2026-92208_remote_mDNS_overflow'
  checkedAt: '2026-10-21T18:09:31.015Z'
zeroDay: true
ingestedAt: '2026-10-21T18:09:27.285Z'
---

## Overview

NoMachine mDNS Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NoMachine. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the parsing of mDNS resource records. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-30982.

## Affected

- `NoMachine 9.8.2_1`

## Remediation

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