Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-29522 is a high-severity local file inclusion (LFI) vulnerability found in ZwickRoell Test Data Management versions prior to 3.0.8. It exists in the /server/node_upgrade_srv.js endpoint, where an unauthenticated attacker can exploit the "firmware" parameter by supplying directory traversal sequences. This allows the attacker to access arbitrary files on the server, potentially disclosing sensitive system files.'}] [1]

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Impact Analysis

This vulnerability can lead to unauthorized disclosure of sensitive system files because an attacker can access arbitrary files on the server without any authentication or user interaction. The attack can be performed remotely over the network and requires no privileges, making it highly dangerous. Such information disclosure could compromise system security and confidentiality.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'The vulnerability exists in the /server/node_upgrade_srv.js endpoint where an unauthenticated attacker can supply directory traversal sequences via the "firmware" parameter to access arbitrary files. Detection can involve monitoring HTTP requests to this endpoint for suspicious directory traversal patterns such as "../" sequences in the firmware parameter.'}, {'type': 'paragraph', 'content': 'A possible command to detect exploitation attempts in web server logs could be using grep to search for directory traversal patterns in requests to the vulnerable endpoint, for example:'}, {'type': 'list_item', 'content': 'grep -i "/server/node_upgrade_srv.js" /var/log/nginx/access.log | grep "firmware=.*\\.\\./"'}, {'type': 'paragraph', 'content': 'Additionally, network intrusion detection systems (NIDS) can be configured to alert on HTTP requests containing directory traversal sequences targeting the firmware parameter on this endpoint.'}] [1]

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Mitigation Strategies

The primary mitigation step is to upgrade ZwickRoell Test Data Management to version 3.0.8 or later, where this local file inclusion vulnerability has been fixed.

Until the upgrade can be applied, it is advisable to restrict access to the /server/node_upgrade_srv.js endpoint, for example by implementing network-level access controls or web application firewall (WAF) rules to block requests containing directory traversal sequences in the firmware parameter.

Monitoring and alerting on suspicious requests to this endpoint can also help in early detection and response.

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