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PatchSiren cyber security CVE debrief

CVE-2025-30033 Siemens CVE debrief

A DLL hijacking vulnerability in Siemens' setup components allows arbitrary code execution during application installation. The vulnerability affects 80+ Siemens industrial software products using the affected setup component. With a CVSS 3.1 score of 7.8 (HIGH), this local attack vector requires user interaction but grants high impact on confidentiality, integrity, and availability. The vulnerability was disclosed in August 2025 and has received multiple advisory updates through February 2026, with vendor fixes available for many products but some remaining without planned remediation.

Vendor
Siemens
Product
Automation License Manager V6.0
CVSS
HIGH 8.5
CISA KEV
Not listed in stored evidence
Original CVE published
2025-08-12
Original CVE updated
2026-09-08
Advisory published
2025-08-12
Advisory updated
2026-09-08

Who should care

Organizations operating Siemens industrial automation software including SIMATIC, PCS 7, TIA Portal, WinCC, and related engineering tools. Critical infrastructure operators, manufacturing facilities, and OT security teams should prioritize assessment due to the broad product impact and potential for supply chain compromise during software installation.

Technical summary

The affected setup component in Siemens industrial software products is vulnerable to DLL hijacking (CWE-427). When a legitimate user installs an application using the affected setup component, an attacker with local access can cause execution of arbitrary code by placing a malicious DLL in a location that the installer searches before legitimate system directories. The vulnerability requires local access and user interaction but results in complete compromise of the host system (CVSS 3.1: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

Defensive priority

HIGH

Recommended defensive actions

  • Apply vendor-provided updates for affected Siemens products where available; consult Siemens ProductCERT advisory for specific product patch versions
  • Harden application hosts to prevent local access by untrusted personnel
  • Install applications only from empty directories to minimize presence of malicious DLLs
  • Prioritize patching for internet-accessible or critical OT/ICS systems
  • Implement application whitelisting and execution controls on engineering workstations
  • Monitor for anomalous DLL loading behavior during software installation processes

Evidence notes

The CISA CSAF advisory ICSA-25-226-22, republished from Siemens ProductCERT SSA-282044, documents this vulnerability affecting Siemens industrial software products. The advisory has undergone 10 revision updates through February 2026, indicating ongoing vendor response and patch availability changes. The CVSS vector confirms local attack vector with user interaction required.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-30033 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-30033

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

  • CVE-2025-30033 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-30033

    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-25-226-22.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-282044.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-282044.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-22

    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.