In June this year, Harvard University uncovered ‘an intrusion’ on its computer networks. The discovery, which was made June 19, affected two IT systems that impacted eight colleges and administrations, the school said.

These included the Faculty of Arts and Sciences, Harvard Divinity School, Radcliffe Institute for Advanced Study, Central Administration, the Graduate School of Design, Harvard Graduate School of Education, Harvard John A. Paulson School of Engineering and Applied Sciences, or Harvard T.H. Chan School of Public Health.

The university suggested to users to change the password of the university e-mail account, a service provided by Microsoft. “Password changes will be required again at a later time as the university takes further steps to enhance security.”

Harvard’s administration said it is uncertain about what data has been stolen. “It is possible that Harvard login credentials (computer and e-mail passwords, including Office 365) stored on the compromised [Faculty of Arts and Sciences] and Central Administration networks have been exposed,” the letter said.