Ivy League University Breach Exposes Data Tied to 851,000 Accounts – Names, Addresses and Donation Details Leaked

A data breach at an Ivy League university has exposed information tied to more than 850,000 accounts belonging to alumni, donors and others. Data breach notification service Have I Been Pwned has analyzed records stolen from Harvard University’s Alumni Affairs and Development systems and confirmed the leak includes 851,000 unique email addresses, reports BleepingComputer. Says Have I Been Pwned, “The data contained 851k unique email addresses relating to the university’s alumni and fundraising systems, along with extensive profile information for donors, alumni, parents and some faculty, staff and students.” The leaked data also includes names, dates of birth, phone numbers, physical addresses, social media profiles and others. Harvard says it discovered on November 18th, 2025, that the systems had been accessed through a phone-based phishing attack.

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