Harvard University security incident history
Hacking, data breaches and other security incidents involving Harvard University, with related coverage.
Harvard alumni and fundraising breach exposes 850,537 accounts
Impact: Account information linked to 850,537 unique email addresses
Harvard University’s alumni and fundraising systems were breached through voice phishing in November 2025, resulting in the theft of personal information. The stolen data included names, contact details, dates of birth, donation histories, family relationships, and employment information, and hackers published it in February 2026. When the breach data was added to Have I Been Pwned in November 2026, the scope was established as accounts linked to 850,537 unique email addresses.
Related reports: 16 · last report →Harvard investigates security breach after threat to publish stolen data
A cybercrime group threatened to publish data stolen from Harvard University. Harvard is investigating the security breach, and the specific extent of the damage and the date of the incident have not been confirmed.
Read on The Harvard Crimson ↗