---
id: CVE-2026-71961
title: >-
  Cudy WR3000 2.0 running firmware before 2.5.24 contains an OS command
  injection vulnerability that allows authenticated attackers to execute
  arbitrary OS commands with root privileges by sending unsanitized input
  through the mesh MQTT co…
summary: >-
  Cudy WR3000 2.0 running firmware before 2.5.24 contains an OS command
  injection vulnerability that allows authenticated attackers to execute
  arbitrary OS commands with root privileges by sending unsanitized input
  through the mesh MQTT co…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
published: '2026-08-19'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:40:01.933'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71961'
references:
  - url: 'https://www.cudy.com/en-us/pages/download-center/wr3000-2-0'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/cudy-wr3000-os-command-injection-via-mesh-mqtt-command-handler
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.02703
epssPercentile: 0.85339
ingestedAt: '2026-09-09T21:22:45.539Z'
---

## Overview

Cudy WR3000 2.0 running firmware before 2.5.24 contains an OS command injection vulnerability that allows authenticated attackers to execute arbitrary OS commands with root privileges by sending unsanitized input through the mesh MQTT command interface. The sync_command binary forwards unsanitized input directly to a shell execution sink in command.lua, enabling attackers with access to the MQTT broker to exploit the default-enabled command execution path to achieve full root-level system compromise.

## Remediation

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