Harvard data breach (2025-11-18) — 850,537 accounts
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".
- Published by source
- 2026-11-03
- First seen by Reality Radar
- 2026-11-03
- Last verified
- 2026-11-03
Affected
- Manufacturer
- Harvard
- Products
- Harvard
Whether your exact unit is affected depends on the model, serial number and region in the official notice.
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Sources
- Have I Been Pwned — breach catalogue Tier B published 2026-11-03
Evidence ledger
Every piece of evidence we store is appended to a public hash chain, so later edits are detectable. Anyone can re-verify it.
| Entry | Kind | Observed | Evidence hash | Entry hash |
|---|---|---|---|---|
| #3617 | new | 2026-11-03 | 4eda9d9e1e4b…90462c | c6773c3e512c…0ca42a |
Chain head: #3807 03071ef7d321…845940