The school notified students Thursday. Potentially at risk are the names, addresses, telephone numbers, email addresses and Social Security numbers of students who were admitted or enrolled at the university since fall of 2010.
The Journal Times reports the total number of students affected could be as high as 15,000.
Campus Technology Services staff doing routine maintenance discovered earlier this month that computer hackers had installed a virus on a university server.
University officials are notifying students so they can take steps to protect their identity and monitor their credit reports and financial statements.