News broke late last month that files were found online containing 68,680,741 Dropbox user accounts plus their salted and hashed passwords. This was linked to a data breach that took place in 2012.
Back in 2012 it was speculated that Dropbox had been hacked, although the company denied it at the time. Dropbox contacted an unknown number of users explaining that an employee Dropbox account had been accessed with a stolen password and this contained “a project document with email addresses”. Dropbox went on to apologize and state they had “put additional controls in place to help make sure it doesn’t happen again.”