What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-19 · updated 2026-09-09
• Weakness: CWE-78

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.

Affected products

• Shenzhen Cudy Technology Co., Ltd. WR3000 2.0: before 2.5.24 — fixed in 2.5.24

How to fix

Upgrade to a fixed version: Shenzhen Cudy Technology Co., Ltd. WR3000 2.0 2.5.24. Check the vendor advisory for mitigations.

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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