ICS Advisories

Risk evaluation

Schneider Electric is aware of multiple vulnerabilities in its Modicon Controller products. The [Modicon Programmable Automation controllers](https://www.se.com/ww/en/product-subcategory/3950-pac-programmable-automation-controllers/) are used for complex networked communication, display and control applications Failure to apply the mitigations or remediations provided below may risk execution of unsolicited command on the PLC which could result in a loss of availability of the controller.

Mitigation summary

Version sv4.20 of Modicon M580 includes a fix for this vulnerability and is available for download here: STEP 1: Update software and firmware. • On the engineering workstation, update to EcoStruxure Control Expert v16.0: https://www.se.com/ww/en/product-range/548-ecostruxure-control-expert-unity-pro/#software-and-firmware • On the Modicon M580 controller, update to firmware SV4.20 or above: https://www.se.com/ww/en/product-range/62098-modicon-m580-epac/#software-and-firmware STEP 2: Update projects in EcoStruxure™ Control Expert by: • Setting up an application password in the project properties • Changing the version of the controller firmware to match the new firmware version of the target controller STEP 3: Rebuild and transfer projects in EcoStruxure™ Control Expert: • Rebuild all current projects