From securelist.com
![](https://media.kasperskycontenthub.com/wp-content/uploads/sites/43/2022/09/20175129/sl-industrial-machines-vulnerabilities-red-1200x600.jpg)
UMAS (Unified Messaging Application Services) is a proprietary Schneider Electric (SE) protocol used to configure and monitor Schneider Electric PLCs. Schneider Electric controllers that use UMAS include Modicon M580 CPU (part numbers BMEP* and BMEH*) and Modicon M340 CPU (part numbers BMXP34*). Controllers are configured and programmed using engineering software – EcoStruxure™ Control Expert (Unity Pro), EcoStruxure™ Process Expert, etc.