Yeah, sorry, but I'm using this site which I assume to be accurate on this point:
CNN plans to live stream the debate on CNN.com and its mobile apps for free without requiring any cable subscription login. You can download the mobile app for iPhone, Android, Windows, Kindle and more via CNN’s website.
There were a lot of questions today in diaries whether one will need a cable subscription to log in and stream the debate, but Mediaite says no, no cable subscription needed.