Did the Feds crack Tor or was the exploit something simpler?

In article ,

Arlen Holder says...

My WISP knows me intimately and tells me what I've been doing at times.


My ISP has 9.5 million users, my email provider has 1.5 billion and 2
billion other people use the same browser/search provider.



I could know
the same information about my neighbors, were I to care to look, since
I have the login access information to their routers and transceivers.

I do not think I would care to be one of your neighbours or a customer
of your WISP
Your WISP is possibly acting illegally and certainly incompetently by
allowing an outsider access to their customers private information.
If you are so concerned about privacy; why do you retain those persons
details?
You are acting like those you complain about.

--
Ken