We previously reported that University of California Berkeley had suffered a data breach affecting 550 students and their families in April 2015. Last Thursday, UC Berkeley announced that a hacker broke into its Financial System in December of 2015 while it was patching a security issue with its financial management system.

According to UC Berkeley, the hacker had access to the financial data of 80,000 students, alumni, current and former employees and vendors whose financial information was in the system, including Social Security numbers and bank information.

UC Berkeley is offering one year of free credit monitoring and identity theft insurance for the affected individuals.