Considering "NATO secret" machines are not allowed on networks connected to the internet they hopefully do not have anything to put people on the ground in danger.
There could however have been a breach in protocols and someone accidentally hooked something up but I doubt something that serious could have happened. It's not like you accidentally hook a fileserver up to the internet.
Confidential documents would (could) still be bad but there are strict rules about storing those as well.
I will just say in an air-gap environment the weak link is the military personnel not the computer..did not Manning case set as a precedent? You can have the secret stuff offline to the real internet all you want..some one with a thinking/ethics will at some point leak the stuff....
Don't be delusional, there were/are obviously beaches which are not red herrings. And all that "classified nato secret", "not allowed on networks connected to the internet", "breach in protocols" and "strict rules" are BS.
But to say for sure, we would need a thorough analysis of the incriminated data.
I'm not saying this isn't bad enough. I'm just saying there are rules in place to prevent these kinds of things. Like physical network separation and machines with disabled interfaces (like network, usb, firewire). You would require physical access to steal data from those machines and it would be either guarded or locked away.
Data security is taken very seriously within the military & NATO but I can't speak for how other countries do things. Accidents happen, things are poorly secured.
I'm just speaking from my own experience, even if it is limited.
No I am saying that if they are doing their jobs properly any data accessible from the internet is data that would not pose (much) of a security threat if released. I agree that most likely a lot of them do poor jobs but you should not underestimate their rules, regulations and strictness when it comes to data security.
There could however have been a breach in protocols and someone accidentally hooked something up but I doubt something that serious could have happened. It's not like you accidentally hook a fileserver up to the internet.
Confidential documents would (could) still be bad but there are strict rules about storing those as well.