CVE-2025-40796
Modified Modified - Updated After Analysis
BaseFortify

Publication date: 2025-09-09

Last updated on: 2026-06-09

Assigner: Siemens AG

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 out-of-bounds read vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition.
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Meta Information
Published
2025-09-09
Last Modified
2026-06-09
Generated
2026-06-16
AI Q&A
2025-09-09
EPSS Evaluated
2026-06-15
NVD
CVE-2025-40796
EUVD
EUVD-2025-27239
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
siemens simatic_pcs_neo 4.1
siemens simatic_pcs_neo 5.0
siemens user_management_component to 2.15.1.3 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability is an out-of-bounds read issue in the User Management Component (UMC) integrated into SIMATIC PCS neo versions 4.1 and 5.0. It allows an unauthenticated remote attacker to read memory outside the intended boundaries, which can cause the system to crash or become unavailable, resulting in a denial of service condition.

Impact Analysis

The vulnerability can impact you by allowing an unauthenticated remote attacker to cause a denial of service, making the affected system unavailable or unstable. This could disrupt operations relying on SIMATIC PCS neo or the User Management Component.

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