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CVE-2025-31353 Siemens CVE debrief

CVE-2025-31353 is a Siemens TeleControl Server Basic SQL injection issue with CVSS 3.1 8.8 (HIGH). According to the CISA CSAF advisory and Siemens product advisory, the flaw is in the internally used UpdateOpcSettings method. An authenticated remote attacker who can reach port 8000 on a vulnerable system may bypass authorization controls, read and write the application's database, and execute code as NT AUTHORITY\NetworkService. The supplied advisory was published on 2025-04-16 and later revised on 2025-05-06 for typo fixes.

Vendor
Siemens
Product
TeleControl Server Basic
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2025-04-16
Original CVE updated
2025-05-06
Advisory published
2025-04-16
Advisory updated
2025-05-06

Who should care

OT/ICS operators running Siemens TeleControl Server Basic, administrators responsible for hosts exposing port 8000, security teams monitoring authenticated access paths, and incident responders supporting affected industrial environments.

Technical summary

The issue is an SQL injection in the UpdateOpcSettings method of Siemens TeleControl Server Basic. The attack requires authenticated remote access and reachability to port 8000. Successful exploitation can affect authorization boundaries, database integrity/confidentiality, and process execution under the NetworkService account.

Defensive priority

High. Treat as urgent on any system where port 8000 is reachable from untrusted networks or where TeleControl Server Basic remains unpatched.

Recommended defensive actions

  • Update Siemens TeleControl Server Basic to V3.1.2.2 or later.
  • Restrict access to port 8000 to trusted IP addresses only.
  • Verify firewall, VPN, and segmentation controls so the service is not exposed beyond intended management networks.
  • Review affected systems for unexpected database changes, failed authentication attempts, or other anomalous activity consistent with misuse of an authenticated interface.
  • Follow CISA ICS recommended practices and defense-in-depth guidance for network segmentation and access control.

Evidence notes

Direct evidence comes from the CISA CSAF advisory ICSA-25-112-01 and the linked Siemens advisory SSA-443402. The advisory text states that the vulnerability is a SQL injection in UpdateOpcSettings, reachable by an authenticated remote attacker over port 8000, with impacts including authorization bypass, database read/write, and code execution as NT AUTHORITY\NetworkService. The source metadata records publication on 2025-04-16 and a 2025-05-06 revision for typo fixes. The supplied enrichment data shows the item is not listed in CISA KEV.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-31353 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-31353

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-31353 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-31353

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2025/icsa-25-112-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-443402.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-443402.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-112-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.