Harvard University data breach exposed info of 851,000 accounts
A November 2025 breach of Harvard University's Alumni Affairs and Development systems exposed data tied to more than 850,000 unique email accounts, according to Have I Been Pwned. The incident affected a database connected to alumni and donor relations.
Why this matters: Alumni databases are not just names and emails. They often hold donation history, personal contact details, and biographical information people shared in confidence with an institution they trusted. Over 850,000 accounts is a large number, and many of those people probably had no idea Harvard held detailed records on them. Universities collect this data for fundraising and stay quiet about it until something goes wrong. The people affected deserve to know exactly what was taken and what Harvard is doing to protect what is left.
Who should care: Cybersecurity · Privacy officers · Administrators
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