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Summary

Ruggedcom ROS devices contain a temporary denial of service vulnerability that could allow an attacker to crash and restart the device. Siemens has released new versions for the affected products and recommends to update to the latest versions.

The following versions of Siemens RUGGEDCOM ROS are affected:

• RUGGEDCOM RMC8388 V5.X (CVE-2025-40935)
• RUGGEDCOM RS416Pv2 V5.X (CVE-2025-40935)
• RUGGEDCOM RS416v2 V5.X (CVE-2025-40935)
• RUGGEDCOM RS900 (32M) V5.X (CVE-2025-40935)
• RUGGEDCOM RS900G (32M) V5.X (CVE-2025-40935)
• RUGGEDCOM RSG2100 (32M) V5.X (CVE-2025-40935)
• RUGGEDCOM RSG2100P (32M) V5.X (CVE-2025-40935)
• RUGGEDCOM RSG2288 V5.X (CVE-2025-40935)
• RUGGEDCOM RSG2300 V5.X (CVE-2025-40935)
• RUGGEDCOM RSG2300P V5.X (CVE-2025-40935)
• RUGGEDCOM RSG2488 V5.X (CVE-2025-40935)
• RUGGEDCOM RSG907R (CVE-2025-40935)
• RUGGEDCOM RSG908C (CVE-2025-40935)
• RUGGEDCOM RSG909R (CVE-2025-40935)
• RUGGEDCOM RSG910C (CVE-2025-40935)
• RUGGEDCOM RSG920P V5.X (CVE-2025-40935)
• RUGGEDCOM RSL910 (CVE-2025-40935)
• RUGGEDCOM RST2228 (CVE-2025-40935)
• RUGGEDCOM RST2228P (CVE-2025-40935)
• RUGGEDCOM RST916C (CVE-2025-40935)
• RUGGEDCOM RST916P (CVE-2025-40935)

Background

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

Vulnerabilities

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-763474 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: 2025-12-09

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