CVE-2026-71961

Cudy WR3000 2.0 OS Command Injection via Mesh MQTT Command Handler

Assigner: VulnCheck
Reserved: 08.08.2026 Published: 19.08.2026 Updated: 19.08.2026

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.

Metrics

CVSS 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
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Shenzhen Cudy Technology Co., Ltd.
Product	WR3000 2.0
Versions	Default: affected affected from 0 to 2.5.24 (excl.)

Vendor

Shenzhen Cudy Technology Co., Ltd.

Product

WR3000 2.0

Versions

Default: affected

affected from 0 to 2.5.24 (excl.)

Credits

Nir Yehoshua finder

References

Problem Types