On its website, the university says some electronic files in the Division of Finance and Administration became accessible on the internet.
The files involved personal information about some current and former employees, vendors and students. The files contained names and Social Security or Employee Tax Identification numbers, and in some cases, addresses and dates of birth.
The investigation into how it happened started last month and the university started notifying those affected this week.
A letter sent to people affected by the data breach included recommendations about ways to protect against identity theft.
Those affected can contact the toll-free call center assisting the University at 1-866-458-3184 from 9 a.m. to 6 p.m. weekdays until Feb. 10, 2014.