What was exposed, when it happened, and which databases confirm it.
- accounts
- 850,537
- Breached
- November 18, 2025
- Last Update
- November 3, 2026
Were you caught in this breach?
Search your email, phone number or username against every record CheckLeaked indexes.
Your address never leaves this page: it is hashed in your browser and only a short fragment of that hash is sent.
What happened
In November 2025, Harvard University suffered a data breach later linked to a ShinyHunters "pay or leak" extortion attempt. 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. In Harvard's disclosure notice, the university stated that the breach impacted "personal information such as email addresses, telephone numbers, home and business addresses, event attendance, details of donations to the University, and other biographical information pertaining to University fundraising and alumni engagement activities".
Compromised Info
- Charitable donations
- Citizenship statuses
- Dates of birth
- Education levels
- Email addresses
- Employers
- Ethnicities
- Family members' names
- Genders
- Job titles
- Marital statuses
- Names
- Occupations
- Phone numbers
- Physical addresses
- Places of birth
- Salutations
- Social media profiles
Attestation
Four independent databases catalog this breach and they do not always agree. Each lane below is one source’s own count.
Sources & Link Methods
- HIBP
FAQ
What was leaked in the Harvard breach?
The Harvard breach exposed: Charitable donations, Citizenship statuses, Dates of birth, Education levels, Email addresses, Employers, Ethnicities, Family members' names, Genders, Job titles, Marital statuses, Names, Occupations, Phone numbers, Physical addresses, Places of birth, Salutations, and Social media profiles.
When did the Harvard breach happen?
The Harvard breach was disclosed on November 18, 2025 and affected 850,537 records.
Am I affected by the Harvard breach?
Search your email, phone or username at checkleaked.cc to find out whether your data appears in the Harvard leak.