Summary
Schneider Electric is aware of a vulnerability in its EcoStruxure OPC UA Server Expert product(s).
The [EcoStruxure OPC UA Server Expert product(s)](https://www.se.com/ww/en/product-country-selector/?pageType=product-range&sourceId=66388#overview) is a state-of-the-art OPC UA communication platform linking Modicon industrial equipment and PLCs to the Industrial Internet of Things (IIoT).
[EcoStruxure Modicon Communication Server](https://www.se.com/ww/en/download/document/ES_MCS_2.01_SP2/) is a communication platform seamlessly linking Modicon PLCs to Aveva System Platform by using the OPC UA protocol with the help of OPC UA Server.
Failure to apply the fix / mitigation provided below may risk denial of service of EcoStruxureTM OPCUA Server Expert, which could result in the loss of real-time process data from Modicon Controller.
Vulnerabilities 1
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High 8.2
CWE-770: Allocation of Resources Without Limits or Throttling vulnerability exists that could cause denial of service o…
Revision history
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#1.0.0
Original Release
References
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EcoStruxure OPC UA Server Expert and EcoStruxure Modicon Communication Server - SEVD-2025-287-01 PDF Version
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2025-287-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2025-287-01.pdf
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Recommended Cybersecurity Best Practices
https://www.se.com/us/en/download/document/7EN52-0390/
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ICS Advisory ICSA-25-301-01 - Web Version
https://www.cisa.gov/news-events/ics-advisories/icsa-25-301-01
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Recommended Practices
https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01
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Recommended Practices
https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
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Recommended Practices
https://www.cisa.gov/topics/industrial-control-systems
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Recommended Practices
https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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Recommended Practices
https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
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Recommended Practices
https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b