Apparently this was one of the top news stories on TVNZ news, but very little info about it, and there is nothing on Adobes own website. Apparently most peoples account usernames and passwords have been hacked on the adobe website. So if you use that username and password combination on other websites, you could be at risk. You can check if you are affected on the www.lastpass.com website.
The only news I can find about it was from Nov 2013, but if it had occurred that long ago, you would have thought they would have enforced a password change.