Actively exploited in the wild
Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability
Tenda - AC7, AC9, and AC10 Routers · Listed in the CISA KEV since 2021-11-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2018-14558
CriticalCVSS 9.8KEVSummary
An issue was discovered on Tenda AC7, AC9, and AC10 devices with specific firmware versions. A command injection vulnerability allows attackers to execute arbitrary OS commands via a crafted goform/setUsbUnload request because the formsetUsbUnload function executes a dosystemCmd function with untrusted input.
Risk Assessment
This vulnerability enables remote command execution on the network device, potentially leading to full control of the router and network traffic.
Recommendation
Update Tenda device firmware to the latest version that fixes this vulnerability. If no update is available, consider restricting access to the management interface.
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Original NVD description (English source)
An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7), AC9 devices with firmware through V15.03.05.19(6318)_CN(AC9), and AC10 devices with firmware through V15.03.06.23_CN(AC10). A command Injection vulnerability allows attackers to execute arbitrary OS commands via a crafted goform/setUsbUnload request. This occurs because the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input.