CVE-2026-71961— Cudy WR3000 2.0 OS Command Injection via Mesh MQTT Command Handler
Quick assessment
Affected
Shenzhen Cudy Technology Co., Ltd. WR3000 2.0
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Cudy WR3000 2.0 设备上运行低于 2.5.24 版本的固件存在操作系统命令注入漏洞。攻击者若具备认证权限，可通过 Mesh MQTT 命令接口发送未经验证和过滤的输入数据，以 root 权限执行任意操作系统命令。其中，sync_command 二进制程序会将未处理的输入直接传递给 command.lua 中的 Shell 执行函数，从而形成命令注入点。具备 MQTT 代理访问权限的攻击者可利用默认启用的命令执行路径，实现完整的 root 级系统控制权获取。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Shenzhen Cudy Technology Co., Ltd. | WR3000 2.0 | < 2.5.24 |
affected |
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I. Basic Information for CVE-2026-71961
Vulnerability Information
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Vulnerability Title
Cudy WR3000 2.0 OS Command Injection via Mesh MQTT Command Handler
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Shenzhen Cudy Technology Co., Ltd. | WR3000 2.0 | 0 ~ 2.5.24 | - |
|
II. Public POCs for CVE-2026-71961
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-71961 (1)
Vendor Pages for CVE-2026-71961 (1)
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🔗 Downloads for WR3000 2.0 – Cudy release-notes
IV. Related Vulnerabilities
V. Comments for CVE-2026-71961
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