The WinVote voting machine was used extensively in Virginia elections during 2004 and 2015. It has been dubbed the worst voting machine ever and that for good reasons. It runs Windows XP, service pack 0. It has by default Wifi enabled.
By Carsten Schuermann
Full abstract and materials: https://www.blackhat.com/us-18/briefings/schedule/#lessons-from-virginia—a-comparative-forensic-analysis-of-winvote-voting-machines-11107