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PatchSiren cyber security CVE debrief

CVE-2023-31315 Siemens CVE debrief

CVE-2023-31315 is a Siemens SCALANCE W700 advisory item published by CISA on 2025-02-11. The issue involves improper validation of a model specific register (MSR) that could let a malicious program with ring0 access modify SMM configuration while SMI lock is enabled, potentially leading to arbitrary code execution.

Vendor
Siemens
Product
SCALANCE WAB762-1 (6GK5762-1AJ00-6AA0)
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2025-02-11
Original CVE updated
2025-05-06
Advisory published
2025-02-11
Advisory updated
2025-05-06

Who should care

OT and industrial network teams running Siemens SCALANCE WAB/WAM/WUB/WUM wireless devices, especially security and operations staff responsible for firmware patching, hardening, and access control in production environments.

Technical summary

The advisory describes a high-severity flaw with CVSS 7.5 (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H). An attacker with ring0 access can abuse improper MSR validation to change SMM configuration even when SMI lock is enabled, which can lead to arbitrary code execution. The affected set spans 19 Siemens SCALANCE product variants listed in the CISA CSAF advisory, and Siemens provides a fixed release path at V3.0.0 or later.

Defensive priority

High. The issue requires local, high-privilege access, but the potential impact is severe in OT environments and the affected product set is broad across Siemens SCALANCE wireless models.

Recommended defensive actions

  • Upgrade affected Siemens SCALANCE devices to V3.0.0 or later, following Siemens guidance.
  • Inventory deployments of the 19 affected SCALANCE product variants named in the advisory.
  • Restrict administrative and kernel-level access on systems that can interact with the affected equipment.
  • Apply industrial network segmentation and least-privilege controls consistent with CISA ICS recommended practices.
  • Verify patch status and maintenance windows before deployment in production OT environments.

Evidence notes

Based on the CISA CSAF advisory ICSA-25-044-09 and Siemens advisory SSA-769027. The source lists 19 affected Siemens SCALANCE product variants and a vendor remediation of V3.0.0 or later. The advisory was published on 2025-02-11 and revised on 2025-05-06 for typo fixes. No Known Exploited Vulnerabilities listing is indicated in the supplied data.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-31315 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-31315

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

  • CVE-2023-31315 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-31315

    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-25-044-09.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-769027.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-769027.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-044-09

    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.