Based on what we know for sure, we have no way of telling for sure if anyone is "guilty." We don't know who has security clearances and what their "need to know," was at the time they had information shared with them. I am almost 100% sure that between the jobs I have had, and my work with a cabinet officer, combined with the clearances my family had to get for a job my brother had, I have a pretty high level of clearance. But someone should not share any level of secret with me, unless I demonstrate a "need to know," for the job I am doing for the government. That is how it SHOULD work.
Anyone in the room when the "Shit hits the fan," will get some on them. We have all been in the room. We are all somewhat guilty. Some are just "guilier," than others.