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ICSA-25-135-09: Siemens User Management Component (UMC) ↗ source

May 15, 2025 CISA ICS Advisory

Summary

Siemens User Management Component (UMC) is affected by three vulnerabilities which could allow an unauthenticated remote attacker to cause a denial of service condition. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available. CVE-2025-30174: Affected products contain a out of bound read buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition. CVE-2025-30175: Affected products contain a out of bound write buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition. CVE-2025-30176: Affected products contain a out of bound read buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition.

Advisory Details CISA ICS CSAF feed

Advisory ID
ICSA-25-135-09
Status
Final · version 3
Initial release
2025-05-13
Last revised
2025-10-14 (3 revisions)
Vendor
Siemens
Critical infrastructure sectors
Critical Manufacturing
Deployed
Worldwide
Vendor headquarters
Germany

Republished vendor advisory. This ICSA is a verbatim republication of Siemens ProductCERT SSA-614723 from a direct conversion of the vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided "as-is" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA…

General Recommendations: As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

Additional Resources: For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories

Credit: Siemens ProductCERT

Affected products (9)
  • SIMATIC PCS neo V4.1 — all versions
  • SIMATIC PCS neo V5.0 — all versions
  • SINEC NMS — <4.0
  • SINEMA Remote Connect — all versions
  • Totally Integrated Automation Portal (TIA Portal) V17 — all versions
  • Totally Integrated Automation Portal (TIA Portal) V18 — all versions
  • Totally Integrated Automation Portal (TIA Portal) V19 — all versions
  • Totally Integrated Automation Portal (TIA Portal) V20 — all versions
  • User Management Component (UMC) — <2.15.1.1
Revision history (3)
  • 2025-10-14 — v3: Added No fix planned for PCS Neo V5
  • 2025-07-08 — v2: Added fix for SINEC NMS V4.0
  • 2025-05-13 — v1: Publication Date

From CISA's machine-readable CSAF 2.0 advisory (JSON).

Vulnerabilities as Stated by the Advisory

CVEWeaknessCVSS v3Details
CVE-2025-30174 CWE-125 Out-of-bounds Read 7.5 High CVE-2025-30174
Affected products contain a out of bound read buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition.

Mitigation: In non-networked scenarios/deployments block TCP ports 4002 and 4004 on machines with UMC installed. In addition if no RT server machines are used, port 4004 can be blocked completely

No fix planned: Currently no fix is planned

Vendor fix: Update to V2.15.1.1 or later version ↗

Affected, fixed & timeline

Affected:

  • SIMATIC PCS neo V4.1 all versions
  • SIMATIC PCS neo V5.0 all versions
  • SINEC NMS <4.0
  • SINEMA Remote Connect all versions
  • Totally Integrated Automation Portal (TIA Portal) V17 all versions
  • Totally Integrated Automation Portal (TIA Portal) V18 all versions
  • Totally Integrated Automation Portal (TIA Portal) V19 all versions
  • Totally Integrated Automation Portal (TIA Portal) V20 all versions
  • User Management Component (UMC) <2.15.1.1

Vendor fix: Update to V4.0 or later version

Vendor fix: Update UMC to V2.15.1.1 or later compatible version https://support.industry.siemens.com/cs/ww/en/view/109987708/

CVE-2025-30175 CWE-787 Out-of-bounds Write 7.5 High CVE-2025-30175
Affected products contain a out of bound write buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition.

Mitigation: In non-networked scenarios/deployments block TCP ports 4002 and 4004 on machines with UMC installed. In addition if no RT server machines are used, port 4004 can be blocked completely

No fix planned: Currently no fix is planned

Vendor fix: Update to V2.15.1.1 or later version ↗

Affected, fixed & timeline

Affected:

  • SIMATIC PCS neo V4.1 all versions
  • SIMATIC PCS neo V5.0 all versions
  • SINEC NMS <4.0
  • SINEMA Remote Connect all versions
  • Totally Integrated Automation Portal (TIA Portal) V17 all versions
  • Totally Integrated Automation Portal (TIA Portal) V18 all versions
  • Totally Integrated Automation Portal (TIA Portal) V19 all versions
  • Totally Integrated Automation Portal (TIA Portal) V20 all versions
  • User Management Component (UMC) <2.15.1.1

Vendor fix: Update to V4.0 or later version

Vendor fix: Update UMC to V2.15.1.1 or later compatible version https://support.industry.siemens.com/cs/ww/en/view/109987708/

CVE-2025-30176 CWE-125 Out-of-bounds Read 7.5 High CVE-2025-30176
Affected products contain a out of bound read buffer overflow vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition.

Mitigation: In non-networked scenarios/deployments block TCP ports 4002 and 4004 on machines with UMC installed. In addition if no RT server machines are used, port 4004 can be blocked completely

No fix planned: Currently no fix is planned

Vendor fix: Update to V2.15.1.1 or later version ↗

Affected, fixed & timeline

Affected:

  • SIMATIC PCS neo V4.1 all versions
  • SIMATIC PCS neo V5.0 all versions
  • SINEC NMS <4.0
  • SINEMA Remote Connect all versions
  • Totally Integrated Automation Portal (TIA Portal) V17 all versions
  • Totally Integrated Automation Portal (TIA Portal) V18 all versions
  • Totally Integrated Automation Portal (TIA Portal) V19 all versions
  • Totally Integrated Automation Portal (TIA Portal) V20 all versions
  • User Management Component (UMC) <2.15.1.1

Vendor fix: Update to V4.0 or later version

Vendor fix: Update UMC to V2.15.1.1 or later compatible version https://support.industry.siemens.com/cs/ww/en/view/109987708/

Scores and weakness types are as CISA or the republishing vendor stated them in this advisory; the linked CVE pages carry the independently enriched CVSS and SSVC assessments.

News Coverage

No coverage found in monitored research blogs or news feeds.

CVEs Referenced in This Publication

CVECVSSAffected
CVE-2025-30174 7.5 High Siemens SIMATIC PCS neo V4.1 A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SINEC NMS (All versions < V4.0), SIN…
CVE-2025-30175 7.5 High Siemens SIMATIC PCS neo V4.1 A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SINEC NMS (All versions < V4.0), SIN…
CVE-2025-30176 7.5 High Siemens SIMATIC PCS neo V4.1 A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SINEC NMS (All versions < V4.0), SIN…

Named by the advisory itself. Each CVE links to its tracked detail page.

Vendors Named in This Publication

Each vendor links to its Known Exploited Vulnerabilities catalog page. Only vendors that appear in the KEV catalog are listed, either because the publication cites one of their KEV entries or because it names them directly.