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CVE-2025-30000 Siemens CVE debrief

CVE-2025-30000 affects Siemens License Server (SLS) and can allow a low-privileged attacker to escalate privileges because user permissions are not properly restricted. The issue was published on 2025-04-08 and later revised on 2025-05-06 for typos only. Siemens’ remediation in the supplied advisory is to update to V4.3 or later.

Vendor
Siemens
Product
Unknown
CVSS
MEDIUM 6.7
CISA KEV
Not listed in stored evidence
Original CVE published
2025-04-08
Original CVE updated
2025-05-06
Advisory published
2025-04-08
Advisory updated
2025-05-06

Who should care

Administrators and security teams responsible for Siemens License Server (SLS), especially in industrial control or engineering environments where multiple users may share access. Any deployment that relies on SLS access controls should review whether low-privileged users can interact with the affected service.

Technical summary

The supplied advisory describes a permissions-control weakness in Siemens License Server (SLS): the application does not properly restrict user permissions, which could let a low-privileged attacker escalate privileges. The CVSS v3.1 vector is AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H, indicating local access, low privileges, and user interaction are required, but the potential impact is high across confidentiality, integrity, and availability.

Defensive priority

Medium. Patch should be prioritized for exposed or shared SLS installations because the issue can lead to privilege escalation, but the source corpus does not indicate active exploitation or KEV inclusion.

Recommended defensive actions

  • Update Siemens License Server (SLS) to V4.3 or later, per the vendor remediation in the advisory.
  • Review local access controls and account separation around SLS deployments to reduce the chance that low-privileged users can reach sensitive functions.
  • Verify which hosts run the affected product and confirm remediation on all instances, including test or secondary systems.
  • Recheck the vendor advisory and CISA notice for any additional product-specific guidance or updates.
  • Apply standard industrial-control-system defense-in-depth practices for administrative access, least privilege, and segmentation.

Evidence notes

The source corpus identifies Siemens as the vendor and Siemens License Server (SLS) as the affected product, with advisory ID ICSA-25-100-01. The advisory description states that the application does not properly restrict user permissions and that a low-privileged attacker could escalate privileges. The remediation field recommends updating to V4.3 or later. The CVSS vector supplied with the advisory is CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H. The revision history shows the 2025-05-06 change was a typo fix only.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-30000 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-30000

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

  • CVE-2025-30000 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-30000

    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-25-100-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-525431.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-525431.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-100-01

    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.