Most ATM's are still running Windows XP, support for the embedded XP version ended in January 2016...
Once you get inside the machine, it's pretty easy to exploit this.
The article states that the hackers were able to drill a small hole next to the PIN pad, seems like something that could be secured better.
The articles states that they will improve making it more hard to get into, so I think havkers can still drill a hole next to pin pad. And I guess with a lot of old ATMs in the world, hackers can atill do this, they can't just replace all other ATMs that quick and just like that. I just hope I can afford a laptop and a dril right now.