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PatchSiren cyber security CVE debrief

CVE-2026-44411 Siemens CVE debrief

CVE-2026-44411 is a high-severity Siemens Solid Edge issue where parsing specially crafted PAR files can trigger uninitialized pointer access. CISA’s advisory describes the impact as potential code execution in the context of the current process. Siemens’ remediation is to update to V226.0 Update 5 or later.

Vendor
Siemens
Product
Solid Edge
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-12
Original CVE updated
2026-05-14
Advisory published
2026-05-12
Advisory updated
2026-05-14

Who should care

Organizations that use Siemens Solid Edge on engineering or design workstations, especially teams that open PAR files from external partners, vendors, or shared repositories. Administrators responsible for CAD software patching and endpoint hardening should prioritize this advisory.

Technical summary

The advisory describes an uninitialized pointer access condition during PAR file parsing in Siemens Solid Edge. The published CVSS vector is CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating local impact with required user interaction and the potential for high confidentiality, integrity, and availability consequences in the current process.

Defensive priority

High

Recommended defensive actions

  • Update Siemens Solid Edge to V226.0 Update 5 or later as directed by Siemens.
  • Prioritize patching on systems that routinely open externally sourced PAR files.
  • Limit exposure to untrusted CAD files by using file validation and controlled transfer workflows.
  • Review workstation hardening and application controls for engineering endpoints.
  • Monitor Siemens and CISA advisory updates for any follow-on guidance or corrections.

Evidence notes

CISA’s CSAF advisory ICSA-26-134-03 and the linked Siemens ProductCERT advisory SSA-921111 identify the issue as uninitialized pointer access while parsing specially crafted PAR files. The advisory revision history shows the initial publication on 2026-05-12, a title correction on 2026-05-13, and a republication on 2026-05-14 referencing Siemens ProductCERT SSA-921111. The published remediation is to update to V226.0 Update 5 or later.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44411 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44411

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

  • CVE-2026-44411 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44411

    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/2026/icsa-26-134-03.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-921111.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-921111.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-134-03

    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.