An unauthorized party accessed Harvard University’s Alumni Affairs and Development Office systems, exposing personal contact information, donation records, and event data belonging to alumni, donors, students, and faculty. The breach was discovered in November 2025; stolen data including email and home addresses has since been confirmed published online (per TechRadar reporting), increasing risk of downstream social engineering campaigns. Organizations that share donor or partnership data with Harvard, and any institution relying on similar alumni management systems, should assess their own exposure and data-sharing agreements.