CVE-2021-45401 Explained : Impact and Mitigation

A Command injection vulnerability exists in Tenda AC10U AC1200 Smart Dual-band Wireless Router AC10U V1.0 Firmware V15.03.06.49_multi via the setUsbUnload functionality. The vulnerability is caused because the client controlled 'deviceName' value is passed directly to the 'doSystemCmd' function.

Understanding CVE-2021-45401

What is CVE-2021-45401?

This CVE refers to a Command injection vulnerability in Tenda AC10U AC1200 Smart Dual-band Wireless Router AC10U V1.0 Firmware V15.03.06.49_multi through the setUsbUnload functionality.

The Impact of CVE-2021-45401

The vulnerability allows an attacker to execute arbitrary commands on the router by manipulating the 'deviceName' parameter, potentially leading to unauthorized access and control of the device.

Technical Details of CVE-2021-45401

Vulnerability Description

The issue arises from passing user-controlled input directly to a system command execution function, leading to command injection.

Affected Systems and Versions

Product: Tenda AC10U AC1200 Smart Dual-band Wireless Router
Version: AC10U V1.0 Firmware V15.03.06.49_multi

Exploitation Mechanism

The vulnerability can be exploited by an attacker sending specially crafted input to the 'deviceName' parameter to execute unauthorized commands.

Mitigation and Prevention

Immediate Steps to Take

Update the router firmware to a patched version that addresses the command injection vulnerability.
Restrict network access to the router to trusted devices only.

Long-Term Security Practices

Regularly monitor for security updates and apply patches promptly.
Implement strong access controls and firewall rules to prevent unauthorized access.

Patching and Updates

Ensure continuous monitoring for firmware updates from the vendor and apply them as soon as they are available.