ICSA-25-254-07: Siemens User Management Component (UMC)
CISA advisory · released 2025-09-09
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 4, 2026-07-07 (final)
CISA's summary
Summary: Siemens' User Management Component (UMC) is affected by multiple vulnerabilities that could allow an unauthenticated remote attacker to execute arbitrary code or to cause a denial of service condition. Siemens has released a new version for User Management Component (UMC) and recommends to update to the latest version. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC PCS neo V4.1 | vers:all/* |
| Siemens | SIMATIC PCS neo V5.0 | vers:all/* |
| Siemens | SIMATIC PCS neo V6.0 | vers:intdot/<6.0.1.1 |
| Siemens | User Management Component (UMC) | vers:intdot/<2.15.1.3 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2025-40795 — CVE-2025-40795 · CWE-121
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.
- CVE-2025-40796 — CVE-2025-40796 · CWE-125
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.
- CVE-2025-40797 — CVE-2025-40797 · CWE-125
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.
- CVE-2025-40798 — CVE-2025-40798 · CWE-125
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.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reported these vulnerabilities to CISA.
- Tenable: reported these vulnerabilities to Siemens.
The advisory's legal notice
The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.
Sources
DeSpy's copy of this version is dated 2026-09-28.
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