Shenzhen Cudy WR3000 up to 2.5.23 Mesh MQTT Command Interface command.lua os command injection

Summaryinfo

A vulnerability was found in Shenzhen Cudy WR3000 up to 2.5.23. It has been rated as very critical. This vulnerability affects unknown code of the file command.lua of the component Mesh MQTT Command Interface. Performing a manipulation results in os command injection. This vulnerability is cataloged as CVE-2026-71961. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Shenzhen Cudy WR3000 up to 2.5.23. It has been classified as very critical. This affects an unknown function of the file command.lua of the component Mesh MQTT Command Interface. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at cudy.com. This vulnerability is uniquely identified as CVE-2026-71961 since 08/08/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/19/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Upgrading to version 2.5.24 eliminates this vulnerability.

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Productinfo

Vendor

• Shenzhen Cudy

Name

• WR3000

Version

• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6
• 2.5.7
• 2.5.8
• 2.5.9
• 2.5.10
• 2.5.11
• 2.5.12
• 2.5.13
• 2.5.14
• 2.5.15
• 2.5.16
• 2.5.17
• 2.5.18
• 2.5.19
• 2.5.20
• 2.5.21
• 2.5.22
• 2.5.23

CPE 2.3info

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• 🔒
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CPE 2.2info

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