Non-random thought: It wasn't a cyber-attack.
?? Theory ??
Why do I say that? --Because it's the excuse that the press is reporting.
Having any type of control software connnected to the internet Is fucking dumb
Agreed, but it happens all the time. The IT department needs access to these systems remotely. They are usually on a LAN behind a firewall but they can still be compromised. Most of our nuclear plants have SCADA systems that are accessible on the internet and many of them still have the default passwords set on them.
Spend a few minutes searching https://www.shodan.io/ if you want to see how much crap is plugged into the internet. It's truly terrifying how vulnerable to this kind of attack we are across the world.