CVE-2025-40737 in SINEC NMS
Summary
by MITRE • 07/08/2025
A vulnerability has been identified in SINEC NMS (All versions < V4.0). The affected application does not properly validate file paths when extracting uploaded ZIP files. This could allow an attacker to write arbitrary files to restricted locations and potentially execute code with elevated privileges (ZDI-CAN-26571).
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Analysis
by VulDB Data Team • 08/21/2025
The vulnerability identified as CVE-2025-40737 affects SINEC NMS software across all versions prior to V4.0, representing a critical path traversal flaw that enables unauthorized file system manipulation. This issue resides within the application's file extraction logic for uploaded ZIP archives, where inadequate input validation permits attackers to manipulate file paths during decompression operations. The flaw stems from insufficient sanitization of archive contents, allowing malicious actors to exploit the system's trust in uploaded files and potentially escalate privileges through strategic file placement.
The technical implementation of this vulnerability demonstrates a classic path traversal attack vector where the application fails to properly validate or sanitize file paths contained within ZIP archives before extraction. When processing uploaded archives, the system does not adequately check for directory traversal sequences such as ../ or ..\ that could redirect file extraction to unintended locations within the file system. This weakness allows attackers to specify arbitrary file paths that bypass normal access controls and write files to restricted directories where the application has elevated privileges. The vulnerability is categorized under CWE-22 Path Traversal and aligns with ATT&CK technique T1059.007 Command and Scripting Interpreter for potential code execution scenarios.
The operational impact of this vulnerability extends beyond simple unauthorized file creation, as attackers can leverage the extracted files to execute code with the privileges of the SINEC NMS process. This presents a significant risk to industrial control systems where the application may run with elevated permissions, potentially enabling attackers to compromise entire network segments or disrupt critical operations. The vulnerability affects the integrity and availability of the system, as malicious files could overwrite legitimate components or establish persistent backdoors. Organizations utilizing SINEC NMS in operational technology environments face potential disruption to their industrial processes and increased exposure to advanced persistent threats.
Mitigation strategies for CVE-2025-40737 should prioritize immediate software updates to version V4.0 or later, where the path validation issues have been addressed. Additionally, organizations should implement strict input validation for all uploaded archives, including comprehensive sanitization of file paths and implementation of secure extraction mechanisms that prevent directory traversal. Network segmentation and access controls should be enforced to limit potential attack surfaces, while monitoring systems should be configured to detect anomalous file system activity. The implementation of principle of least privilege for the SINEC NMS application and regular security assessments of industrial control systems will further reduce the risk exposure associated with this vulnerability.