EcoStruxure™ OPC UA Server Expert and EcoStruxure™ Modicon Communication Server

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.