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TI-2025-27243 Aliases CVE-2025-40795GHSA-8mhf-qqpq-2vcr

Stack-based buffer overflow in Siemens SIMATIC PCS neo V4.1

Priority MEDIUM 41CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00715 53rd percentileScored 2026-11-07
Fix Fixed SIMATIC PCS neo V6.0 (Siemens): V6.0 SP1 Update 1User Management Component (UMC) (Siemens): V2.15.1.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SiemensSIMATIC PCS neo V4.1all versions—No fix listedCNA
SiemensSIMATIC PCS neo V5.0all versions—No fix listedCNA
SiemensSIMATIC PCS neo V6.0before V6.0 SP1 Update 1V6.0 SP1 Update 1Patch availableCNA
SiemensUser Management Component (UMC)before V2.15.1.3V2.15.1.3Patch availableCNA
  • SIMATIC PCS neo V4.1 VendorSiemens Affected all versions Fixed in — No fix listed CNA
  • SIMATIC PCS neo V5.0 VendorSiemens Affected all versions Fixed in — No fix listed CNA
  • SIMATIC PCS neo V6.0 VendorSiemens Affected before V6.0 SP1 Update 1 Fixed in V6.0 SP1 Update 1 Patch available CNA
  • User Management Component (UMC) VendorSiemens Affected before V2.15.1.3 Fixed in V2.15.1.3 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:siemens:simatic_pcs_neo:4.1:*:*:*:*:*:*:*4.1VulnerableSiemens
cpe:2.3:a:siemens:simatic_pcs_neo:5.0:*:*:*:*:*:*:*5.0VulnerableSiemens
cpe:2.3:a:siemens:user_management_component:*:*:*:*:*:*:*:*before 2.15.1.3VulnerableSiemens
  • cpe:2.3:a:siemens:simatic_pcs_neo:4.1:*:*:*:*:*:*:* Versions 4.1 Vulnerable ·Siemens
  • cpe:2.3:a:siemens:simatic_pcs_neo:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Siemens
  • cpe:2.3:a:siemens:user_management_component:*:*:*:*:*:*:*:* Versions before 2.15.1.3 Vulnerable ·Siemens

Remediation

  • Fix · CNA SIMATIC PCS neo V6.0 (Siemens) Fixed in V6.0 SP1 Update 1
  • Fix · CNA User Management Component (UMC) (Siemens) Fixed in V2.15.1.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Siemens SIMATIC PCS neo V6.0, User Management Component (UMC) V2.15.1.3, V6.0 SP1 Update 1

    4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2025-27246 Out-of-bounds read in Siemens SIMATIC PCS neo V4.1Priority LOW 38
    • TI-2025-27245 Out-of-bounds read in Siemens SIMATIC PCS neo V4.1Priority LOW 38
    • TI-2025-27244 Out-of-bounds read in Siemens SIMATIC PCS neo V4.1Priority LOW 38
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-40795
  2. 2026-10-03 Alias added: GHSA-8mhf-qqpq-2vcr

References

Advisory 1

  • TI-2021-03396 Out-of-bounds read in Wibu-Systems CodeMeter CVSS 3.1CRITICAL 9.1
  • TI-2025-21515 Out-of-bounds read in Siemens SIMATIC PCS neo V4.1 CVSS 4.0HIGH 8.7
  • TI-2025-21514 Out-of-bounds write in Siemens SIMATIC PCS neo V4.1 CVSS 4.0HIGH 8.7
  • TI-2023-24750 SQL injection in Siemens SIMATIC PCS neo CVSS 3.1HIGH 8.0
  • TI-2023-24902 A vulnerability has been identified in Opcenter Execution Foundation (All versions <… CVSS 3.1HIGH 8.8
  • TI-2023-24906 Improper input validation in Siemens Opcenter Execution Foundation CVSS 3.1HIGH 7.5
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences