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VulnerabilityPublished

CVE-2025-40737: Siemens SINEC NMS · Path Traversal

Affects Siemens SINEC NMSSource CVE Database V5

0

Not known to be exploited · 13% EPSS · CVSS 8.8 High.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
13.4% chance of exploitation in 30 days – higher than 96% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Jul 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Siemens SINEC NMSAffected
  • =0
Fixed in–

AI-suggested

Organizations should prioritize upgrading Siemens SINEC NMS to version 4.0 or later once available, as this will contain the official patch addressing the path traversal flaw. Until patching is possible, implement strict network segmentation to isolate SINEC NMS servers from untrusted networks and limit access to trusted administrators only. Employ application-layer filtering to block malicious ZIP files or restrict file upload functionality where feasible. Monitor file system changes on SINEC NMS hosts for unauthorized modifications, focusing on directories commonly targeted by path traversal exploits. Utilize host-based intrusion detection systems (HIDS) to detect anomalous file writes or privilege escalations. Conduct regular audits of user privileges to ensure minimal necessary access is granted, reducing the risk posed by compromised accounts. Additionally, implement strict input validation and sandboxing for file extraction processes if custom controls are possible. Finally, maintain comprehensive logging and alerting to detect exploitation attempts promptly.

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 execute code with elevated privileges (ZDI-CAN-26571).

References

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