Many large organizations use Windows Deployment Services (WDS) to install customized operating systems on new machines in the network. The Windows Deployment Services is usually, by its nature, accessible to anyone connected via an LAN port and provides the relevant software. They determine the Operating System as well as the accompanying programs and services for each new network element.

https://research.checkpoint.com/pxe-dust-finding-a-vulnerability-in-windows-servers-deployment-services/