ICS Advisory

Siemens Heliox EV Chargers

Release Date

March 12, 2026

Alert Code ICSA-26-071-05 Related topics: Industrial Control System Vulnerabilities, Industrial Control Systems View CSAF

Summary

Heliox EV Chargers listed below contain improper access control vulnerability that could allow an attacker to reach unauthorized services via the charging cable. Siemens has released new versions for the affected products and recommends to update to the latest versions.

The following versions of Siemens Heliox EV Chargers are affected:

• Heliox Flex 180 kW EV Charging Station
• Heliox Mobile DC 40 kW EV Charging Station

| CVSS | Vendor | Equipment | Vulnerabilities |
| --- | --- | --- | --- |
| v3 2.6 | Siemens | Siemens Heliox EV Chargers | Improper Restriction of Communication Channel to Intended Endpoints |

Background

• Critical Infrastructure Sectors: Critical Manufacturing
• Countries/Areas Deployed: Worldwide
• Company Headquarters Location: Germany

Vulnerabilities

Expand All +

CVE-2025-27769

Affected devices contain improper access control that could allow an attacker to reach unauthorized services via the charging cable.

View CVE Details

Affected Products

Siemens Heliox EV Chargers

Vendor:
Siemens Product Version:
Heliox Flex 180 kW EV Charging Station, Heliox Mobile DC 40 kW EV Charging Station Product Status:
known_affected

Remediations

Vendor fix
Contact customer support for patch information via OTA update

Relevant CWE: CWE-923 Improper Restriction of Communication Channel to Intended Endpoints

Metrics

| CVSS Version | Base Score | Base Severity | Vector String |
| --- | --- | --- | --- |
| 3.1 | 2.6 | LOW | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N |

Acknowledgments

• Siemens ProductCERT reported this vulnerability to CISA.

General Recommendations

As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

Additional Resources

For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories

Terms of Use

The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.

Legal Notice and Terms of Use

This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).

Recommended Practices

CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities.

Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet.

Locate control system networks and remote devices behind firewalls and isolate them from business networks.

When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

Advisory Conversion Disclaimer

This ICSA is a verbatim republication of Siemens ProductCERT SSA-126399 from a direct conversion of the vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided "as-is" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA does not endorse any commercial product or service. Please contact Siemens ProductCERT directly for any questions regarding this advisory.

Revision History

• Initial Release Date: 2026-03-10

| Date | Revision | Summary |
| --- | --- | --- |
| 2026-03-10 | 1 | Publication Date |
| 2026-03-12 | 2 | Initial CISA Republication of Siemens ProductCERT SSA-126399 advisory |

Legal Notice and Terms of Use

This product is provided subject to this Notification and this Privacy & Use policy.

Vendor

• Siemens

Tags

Sector: Critical Manufacturing Sector Topics: Industrial Control System Vulnerabilities, Industrial Control Systems

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