Authenticated OS Command Injection in TOTOLINK X2000R Router

Executive Summary

This vulnerability is an OS command injection flaw in the batchupg functionality of TOTOLINK X2000R router firmware version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. It allows an attacker to execute arbitrary commands on the device by sending a specially crafted HTTP request. The attack requires authentication but can lead to full system compromise.

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Detection Guidance

Detecting this vulnerability requires checking for unauthorized HTTP requests to the batchupg functionality in TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. Monitor network traffic for suspicious POST requests targeting the vulnerable endpoint. Inspect system logs for unexpected command execution or privilege escalation attempts.

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Impact Analysis

If exploited, this vulnerability could allow an attacker to take full control of your TOTOLINK X2000R router. This could lead to network compromise, data theft, or the device being used as part of a botnet for further attacks. Attackers might intercept traffic, install malware, or disrupt network services.

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Compliance Impact

This vulnerability allows arbitrary code execution via authenticated HTTP requests, which could lead to unauthorized data access, modification, or exfiltration. Such risks may violate GDPR's data protection requirements or HIPAA's safeguards for protected health information if exploited.

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Mitigation Strategies

Immediately update the TOTOLINK-X2000R firmware to the latest patched version. Disable the batchupg functionality if no longer needed. Restrict access to the device's web interface to trusted networks only. Apply network segmentation to limit exposure of the vulnerable service.

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