GoKawiilHarvard breach exposed 850,500 accounts, Have I Been Pwned confirms
Have I Been Pwned has verified that a November 2025 breach of Harvard's Alumni Affairs and Development systems exposed data tied to more than 850,500 unique email addresses. The leaked records include names, emails, phone numbers, addresses, dates of birth and social media profiles, though Harvard says no Social Security numbers, passwords or payment data were stored on the affected systems. The ShinyHunters extortion gang claimed responsibility and published a 1.1GB archive online after Harvard declined to pay a ransom.
GoKawiil's interpretation of the reporting above, not reported fact.
The confirmation by Have I Been Pwned gives outside verification of the breach's scale after Harvard itself had not disclosed a specific number of affected individuals. The incident shows how fundraising and alumni-engagement databases, often holding rich biographical and donation histories, have become lucrative targets for extortion groups even without financial account data. Harvard's refusal to pay ransom, followed by public leaking, illustrates the growing pattern of extortion gangs publishing stolen data as leverage against institutions that resist payment.
- 850,500 unique accounts had data exposed in the Harvard Alumni Affairs breach, per Have I Been Pwned.
- ShinyHunters claims it stole over 1 million records and leaked 1.1GB after Harvard refused ransom.
- No Social Security numbers, passwords or payment card data were stored in the breached systems, Harvard says.
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Published there as: “Harvard University data breach exposed info of 851,000 accounts”
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