Lasell College says a hacker accessed data containing personal information on about 20,000 current and former students, faculty, staff and alumni.
The college told The Boston Globe on Wednesday it has no evidence that the information, which included names and Social Security numbers, has been misused. But it has sent an e-mail notice to the people who may be affected.
College officials say they discovered the breach on Feb. 6 and notified law enforcement and officials in the states where those affected live. Lasell says the hacker is believed to be an employee.
Lasell spokeswoman Deborah Gelch says the college regrets the situation and is taking steps to improve the protection of its data.
Lasell has about 1,300 undergraduate students.