Ohio State University - 2010
Students, professors and other University affiliates were notified that their information may have been accessed by a hacker. University officials discovered the breach in late October. Unauthorized individuals logged into an Ohio State server and had access to names, Social Security numbers, dates of birth and addresses of current and former students, faculty, staff, University consultants and University contractors.UPDATE (1/14/11): 517,729 former students and 65,663 current students were affected. Exact numbers for current and former faculty, staff, consultants and contractors were not given.UPDATE (2/22/2011): As of February 22, OSU was still attempting to find and inform affected individuals of the breach. Around 226,000 notification letters were mailed to alumni in February.