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PatchSiren cyber security CVE debrief

CVE-2024-26982 Siemens CVE debrief

CVE-2024-26982 is a HIGH-severity Linux kernel Squashfs issue referenced in Siemens advisory ICSA-25-072-03 for SIMATIC S7-1500 TM MFP - BIOS. The published advisory describes the flaw as a missing check to ensure an inode number is not the invalid value of zero. The supplied CVSS vector indicates a local attack path with low privileges and no user interaction, and the advisory states that no fix is currently available.

Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - BIOS
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2024-04-09
Original CVE updated
2026-05-14
Advisory published
2024-04-09
Advisory updated
2026-05-14

Who should care

Organizations that use or manage Siemens SIMATIC S7-1500 TM MFP - BIOS should review the advisory, especially teams responsible for industrial control systems, embedded platforms, and any local software deployment or maintenance workflows on affected equipment. Security teams should also pay attention because the issue is local and low-privilege, which can matter where multiple users or maintenance access exist.

Technical summary

The source corpus ties CVE-2024-26982 to a Linux kernel Squashfs validation defect: the inode number was not being checked against the invalid value zero. The advisory provides a CVSS 3.1 vector of AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H, indicating a locally reachable issue requiring low privileges and no user interaction, with high confidentiality and availability impact. The Siemens advisory also states that no fix is available at the time of publication.

Defensive priority

High for affected Siemens deployments, because the advisory lists no available fix and the vulnerability can be exercised locally with low privileges. Prioritize exposure review, access control hardening, and operational safeguards until Siemens provides a remediation path.

Recommended defensive actions

  • Confirm whether your environment includes Siemens SIMATIC S7-1500 TM MFP - BIOS systems referenced by ICSA-25-072-03.
  • Restrict and monitor local access on affected systems, since the CVSS vector requires local access and low privileges.
  • Follow Siemens/CISA advisory guidance and track for a future remediation update, because the advisory states that no fix is currently available.
  • Apply defense-in-depth controls for industrial systems, including least privilege, trusted software sources, and strict change control.
  • Review maintenance, build, and deployment workflows to ensure only trusted applications and artifacts are used on affected platforms.

Evidence notes

This debrief is based only on the supplied CISA CSAF advisory metadata and linked official references. The advisory title is Siemens SIMATIC S7-1500 TM MFP - BIOS, the description states the Linux kernel Squashfs inode-zero validation issue, the CVSS vector is AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H, and the remediation section says no fix is currently available with a workaround to use trusted sources. No KEV entry or ransomware-campaign linkage is provided in the supplied corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-26982 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-26982

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

  • CVE-2024-26982 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-26982

    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-25-072-03.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-503939.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-503939.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-072-03

    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.