CVE-2025-40737
Published: 08 July 2025
Summary
CVE-2025-40737 is a high-severity Path Traversal (CWE-22) vulnerability in Siemens Sinec Nms. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 17.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly requires validation of file paths in uploaded ZIP files to block path traversal sequences and prevent arbitrary file writes to restricted locations.
Mandates timely flaw remediation by patching to SINEC NMS V4.0 or later, eliminating the vulnerability as recommended by the vendor advisory.
Monitors and protects against unauthorized changes to files and information, mitigating arbitrary writes from path traversal and detecting potential code execution.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Path traversal in ZIP extraction on a network-accessible app directly enables remote exploitation for RCE and privilege escalation; arbitrary file write facilitates web shell deployment.
NVD Description
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…
more
execute code with elevated privileges (ZDI-CAN-26571).
Deeper analysisAI
CVE-2025-40737 is a path traversal vulnerability (CWE-22) affecting SINEC NMS in all versions prior to V4.0. The application does not properly validate file paths when extracting uploaded ZIP files, which can enable attackers to write files outside the intended directory.
The vulnerability has a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating network accessibility, low attack complexity, and the need for low privileges such as an authenticated user account. Exploitation allows an attacker to write arbitrary files to restricted locations on the system, potentially resulting in code execution with elevated privileges.
Siemens has published security advisory SSA-078892 at https://cert-portal.siemens.com/productcert/html/ssa-078892.html, which provides details on the vulnerability and recommends updating to SINEC NMS V4.0 or later to mitigate the issue.
Details
- CWE(s)