Intel Management Engine is a well known backdoor that is present in every single Intel CPU/motherboard and it is literally all over all of NATO. People said that didn't exist until exploits started popping up, years later, in devices every single consumer has easy, convenient, 24 hour access to.

NATO was built on the understanding that the US could be relied upon to act in the interests of NATO as a whole. I do not think that the threat from US has been adequately considered by other NATO countries until now.

If you don't see how opaque firmware blobs which could potentially contain literally anything could have been an underestimated threat by NATO countries (all of which, by the way, are basically just US client states), then I suspect you're rather closer to delusional thinking than I am.