Read an article a while back that said a lot of ATMs are running Win XP and cannot be updated without replacing the hardware, an expense the bank's don't want to pay.
Looked for the article, can't find it. Maybe it was a bunch of hooey.
https://www.theregister.co.uk/2017/08/18/atm_purchase/
http://info.rippleshot.com/blog/windows-xp-still-running-95-percent-atms-world