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PatchSiren cyber security CVE debrief

CVE-2024-35960 Siemens CVE debrief

A critical vulnerability in the Mellanox mlx5 driver affects Siemens industrial network devices. The flaw involves improper linking of flow steering (fs) rules into the rule tree, which can lead to integrity and availability impacts on affected systems. The vulnerability is network-accessible without authentication, making it particularly severe for exposed industrial control systems.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
CRITICAL 9.1
CISA KEV
Not listed in stored evidence
Original CVE published
2025-08-12
Original CVE updated
2026-02-25
Advisory published
2025-08-12
Advisory updated
2026-02-25

Who should care

Organizations operating Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, SCALANCE XCM-/XRM-/XCH-/XRH-300 family, or RUGGEDCOM RST2428P industrial network devices; critical infrastructure operators; OT security teams; industrial network administrators

Technical summary

The vulnerability exists in the net/mlx5 kernel driver used by Siemens industrial network devices. The flaw involves improper linking of new flow steering (fs) rules into the rule tree structure. With a CVSS 3.1 score of 9.1 (Critical), the vulnerability is exploitable over the network without authentication, requiring no user interaction. Successful exploitation can result in high impact to integrity and availability, though confidentiality is not affected. The attack vector is network-based with low attack complexity.

Defensive priority

critical

Recommended defensive actions

  • Apply vendor fix: Update affected Siemens SINEC OS and SCALANCE devices to V3.1 or later version per Siemens ProductCERT guidance
  • Verify device inventory against CISA ICS advisory ICSA-25-226-15 to confirm exposure
  • Implement network segmentation for industrial control systems per CISA recommended practices
  • Monitor for anomalous network traffic to affected mlx5-based systems
  • Review and apply CISA defense-in-depth strategies for industrial control systems

Evidence notes

CISA CSAF advisory ICSA-25-226-15 documents this vulnerability in Siemens SINEC OS and related industrial network infrastructure products. The advisory was initially published 2025-08-12 and most recently updated 2026-02-25 to reflect corrections to affected product lists and removal of rejected CVEs. Siemens ProductCERT advisory SSA-613116 provides the authoritative vendor remediation guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-35960 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-35960

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

  • CVE-2024-35960 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-35960

    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-25-226-15.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-613116.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-613116.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-15

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/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://www.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.