Data breach

Harvard

Cambridge, United States1 source

ReportedHave I Been Pwned has verified the leaked data. Harvard has not confirmed it.

See it on the live map Am I affected?

Cambridge, United States. Placed at the organisation's headquarters.

Listed by Have I Been Pwned: 850.5K email addresses
First reported: 3 Nov 2026
Latest source: 3 Nov 2026

What is known

Listed by Have I Been Pwned

850,537 email addresses

Counted by Have I Been Pwned from the leaked data. Not confirmed by the organisation.

Claimed

No claimed figure

Data involved

Charitable donationsCitizenship statusesDates of birthEducation levelsEmail addressesEmployersEthnicitiesFamily members' namesGendersJob titlesMarital statusesNamesOccupationsPhone numbersPhysical addressesPlaces of birthSalutationsSocial media profiles

Cause

Cause not stated

Attack: 18 Nov 2025
Disclosed: 3 Nov 2026
First seen by Black Shard: 9 Nov 2026

Sources

Have I Been PwnedVerified data3 Nov 2026Have I Been Pwned has verified the leaked data

Status timeline

3 Nov 2026
Have I Been Pwned, verified data
3 Nov 2026
Status: reported

What to do

If you have an account, change that password, and anywhere you reused it.
Turn on two-factor authentication, ideally an authenticator app or passkey, not SMS.
Expect phishing that uses your real details. Do not click links in messages about this incident; go to the company's site directly.
If payment cards were involved, watch statements and ask your bank for a new card.
If government ID or social security numbers were involved, consider a credit freeze.

Talk to our team 24/7 incident line: 1800 370 270

How sure we are

That it happened as stated 70%

The place 75%

1 independent source. Placed at the organisation's headquarters.

Not known yet

Who did itA statement from the organisation

Update log

9 Nov 2026First seen.

Under attack? Call the incident line.

Black Shard's team can check your exposure, take a fix off your plate or step in on a live incident.

Talk to our team Breach response

24/7 incident line1800 370 270Call first, then work through the first-hour steps.