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CVE-2025-40795

Siemens User Management Component remote code execution

9.8 CRITICALEPSS 0.70%
  1. Published9 Sept 2025

Description

A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SIMATIC PCS neo V6.0 (All versions < V6.0 SP1 Update 1), User Management Component (UMC) (All versions < V2.15.1.3). Affected products contain a stack-based buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to execute arbitrary code or to cause a denial of service condition.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Siemens Simatic Pcs Neo4.1 · 5.0
Siemens User Management Component< 2.15.1.3

Remediation

Fixed in
Siemens User Management Component≥ 2.15.1.3

References

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Frequently asked

Is CVE-2025-40795 being actively exploited?

CVE-2025-40795 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.70%.

How severe is CVE-2025-40795?

CVE-2025-40795 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.70% probability of exploitation.

Which products are affected by CVE-2025-40795?

Affected products include Siemens Simatic Pcs Neo, Siemens User Management Component.

How do I fix CVE-2025-40795?

Upgrade affected software to a fixed version, for example Siemens User Management Component 2.15.1.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-40795 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.