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PatchSiren cyber security CVE debrief

CVE-2025-40740 Siemens CVE debrief

CVE-2025-40740 is a high-severity vulnerability in Siemens Solid Edge SE2025 that can be triggered when the application parses specially crafted PAR files. The issue is an out-of-bounds read past the end of an allocated structure, and Siemens/CISA warn it could let an attacker execute code in the context of the current process. The supplied advisory recommends avoiding untrusted PAR files and updating to V225.0 Update 5 or later.

Vendor
Siemens
Product
Solid Edge SE2025
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2025-07-08
Original CVE updated
2025-07-08
Advisory published
2025-07-08
Advisory updated
2025-07-08

Who should care

Organizations and users running Siemens Solid Edge SE2025, especially engineering, manufacturing, and design teams that routinely open PAR files from external or untrusted sources. Security teams responsible for CAD application hardening and patch management should prioritize verification and remediation.

Technical summary

The advisory describes an out-of-bounds read condition in Solid Edge SE2025 while parsing specially crafted PAR files. The CVSS vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) indicates local access and user interaction are required, but successful exploitation could result in code execution within the current process. The affected product scope in the supplied source is Siemens Solid Edge SE2025.

Defensive priority

High

Recommended defensive actions

  • Update Siemens Solid Edge SE2025 to V225.0 Update 5 or later.
  • Do not open untrusted PAR files in the affected application.
  • Limit exposure to externally sourced CAD content and validate file provenance before opening.
  • Review workstation and engineering-team patching to confirm the fixed version is deployed.
  • Monitor Siemens and CISA advisories for any follow-up guidance or revisions.

Evidence notes

This debrief is based only on the supplied CISA CSAF advisory for ICSA-25-191-02 and the linked Siemens security advisory references. The source explicitly states: affected applications contain an out-of-bounds read past the end of an allocated structure while parsing specially crafted PAR files; this could allow code execution in the context of the current process; remediation is to update to V225.0 Update 5 or later and avoid untrusted PAR files. Timing reflects the CVE published and modified dates supplied for 2025-07-08.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-40740 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-40740

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

  • CVE-2025-40740 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-40740

    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-25-191-02.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-091753.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-091753.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-191-02

    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.