Harvard University data breach exposed 851,000 accounts
Original title: Harvard University data breach exposed info of 851,000 accounts
Have I Been Pwned confirmed 850,500 accounts with names emails and addresses exposed in the November 2025 Harvard breach.
Hackers breached Harvard University Alumni Affairs and Development systems in November 2025. Data of more than 850,000 accounts was stolen including emails phone numbers addresses and biographical details. The ShinyHunters gang claimed responsibility and leaked a 1.1GB archive after Harvard refused ransom. No passwords or financial data was exposed.
Unconfirmed: No specific threat actor attribution stated
- 850,500 unique email addresses confirmed
- Includes alumni donors staff faculty and students
- Biographical and event attendance records stolen
Impact: Personal information of 851,000 accounts exposed
- Vendors
- Harvard University
- Threat actors
- ShinyHunters
- Victims
- Harvard University
- Countries
- US
From the original article
2 min read at bleepingcomputer.com
Hackers who breached Harvard University's Alumni Affairs and Development systems in November 2025 stole data linked to more than 850,000 unique email addresses, according to breach notification service Have I Been Pwned. [...]
By Sergiu Gatlan · bleepingcomputer.com
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