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Sinec NmsApplication · Siemens

CVE-2025-40738

HIGH · 8.8 CVSS v3.1 Published 2025-07-08
Fix available
A fix is available. Upgrade to 4.0 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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-26572).

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

SINEC NMS versions prior to V4.0 contain a path traversal vulnerability in ZIP file extraction. The application does not validate that file paths within uploaded ZIP archives stay within the intended extraction directory, allowing attackers to craft archives containing paths like '../../../etc/passwd' to write files to arbitrary system locations and potentially achieve code execution with elevated privileges.

MitigationUpgrade to SINEC NMS V4.0 or later. If immediate patching is not possible, implement strict path validation on extracted files, use canonical path checks to ensure files remain within the intended extraction directory, and consider restricting ZIP upload functionality until the patch is applied.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Sinec NmsApplication
Affected:< 4.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm SINEC NMS is installed
    Locate the SINEC NMS installation directory or check for the SINEC NMS service running on the system. Common locations include C:\Program Files\Siemens\SINEC\NMS or /opt/sinec/nms on Linux systems.
    Affected if SINEC NMS software is found on the system
  2. Identify the installed version
    Check the SINEC NMS version information, typically found in the application UI under 'About' or 'System Information', or check version files in the installation directory.
    Affected if The installed version is below V4.0 (e.g., V3.x or earlier)
  3. Verify web interface accessibility
    Check if the SINEC NMS web interface is accessible. The vulnerability exploits the file upload feature during ZIP archive extraction, which is typically available through the web interface.
    Affected if The web interface is reachable and the file upload functionality is available
  4. Review upload/extraction logs
    Examine SINEC NMS logs for any ZIP file upload and extraction operations. Logs may be found in the application's log directory under names containing 'upload', 'archive', or 'extraction'.
    Affected if Recent upload activities involving ZIP archives are recorded in the logs

The environment is affected if SINEC NMS version is identified as V3.x or earlier and the web-based file upload feature is accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 4.0 or later
Fixed in 4.0
Interim mitigation

Upgrade to SINEC NMS V4.0 or later. If immediate patching is not possible, implement strict path validation on extracted files, use canonical path checks to ensure files remain within the intended extraction directory, and consider restricting ZIP upload functionality until the patch is applied.

Recommended fix High confidence

SINEC NMS V4.0

  1. 1. Identify the current SINEC NMS version by accessing the system management interface or checking the installed software
  2. 2. Review Siemens upgrade documentation for SINEC NMS V4.0 to understand prerequisites and procedures
  3. 3. Create a complete backup of the current SINEC NMS installation, including configuration files and databases
  4. 4. Schedule a maintenance window for the upgrade process
  5. 5. Follow the official Siemens upgrade procedure to upgrade SINEC NMS to version V4.0
  6. 6. After upgrade, verify the installation was successful by checking the version number
  7. 7. Test critical functionalities to ensure the upgrade did not break existing operations
Caveat Review Siemens release notes for V4.0 to check for any breaking changes or configuration adjustments required

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Sinec Nms Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA4.0 h
20.0 hours of engineering $3,560
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-40738 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data