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Response snapshot Oct 26, 2026, 22:12 UTC

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Disclosed incidenthibp-universityofpennsylvania

University of Pennsylvania breach: 623,750 accounts exposed

In October 2025, the University of Pennsylvania was the victim of a data breach followed by a ransom demand , largely affecting its donor database. After the incident, the attackers sent inflammatory emails to some victims.

At a glance

Sources
1 source

What to do

If you or your organization used this service, change reused passwords, watch for phishing that uses the exposed data, and check the disclosure for the organization's guidance.

Read Have I Been Pwned: University of Pennsylvania (opens a new tab)

What happened

In October 2025, the University of Pennsylvania was the victim of a data breach followed by a ransom demand , largely affecting its donor database. After the incident, the attackers sent inflammatory emails to some victims. The data was later published online in February 2026 and included 624k unique email addresses alongside names and physical addresses.

For some donor records, additional personal information was exposed, including gender and date of birth. A small subset of records also contained religion, spouse name, estimated income and donation history.

Related technology

Sources

  1. Primary source

    Have I Been Pwned: University of Pennsylvania (opens a new tab)

    Verified breach loaded into Have I Been Pwned: account count, exposed data types, and dates.

    Published Checked

  2. Primary source

    Have I Been Pwned breach API (opens a new tab)

    The breach list that supplied this entry.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, February 16). University of Pennsylvania breach: 623,750 accounts exposed. https://kevwire.com/record/hibp-universityofpennsylvania

MLA

"University of Pennsylvania breach: 623,750 accounts exposed." KEVWire, 16 Feb. 2026, kevwire.com/record/hibp-universityofpennsylvania.

Chicago

KEVWire. "University of Pennsylvania breach: 623,750 accounts exposed." Last modified February 16, 2026. https://kevwire.com/record/hibp-universityofpennsylvania.

Evidence summary (plain text)

University of Pennsylvania breach: 623,750 accounts exposed (Feb 16, 2026).
In October 2025, the University of Pennsylvania was the victim of a data breach followed by a ransom demand , largely affecting its donor database. After the incident, the attackers sent inflammatory emails to some victims. The data was later published online in February 2026 and included 624k unique email addresses alongside names and physical addresses. For some donor records, additional personal information was exposed, including gender and date of birth. A small subset of records also contained religion, spouse name, estimated income and donation history.
Sources:
Have I Been Pwned: University of Pennsylvania: https://haveibeenpwned.com/Breach/UniversityOfPennsylvania
Have I Been Pwned breach API: https://haveibeenpwned.com/api/v3/breaches
Record ID: hibp-universityofpennsylvania.
Record origin: Ingested record.
AI evidence: Not assessed.
About this data

This record was ingested from a data source. Retrieved: Oct 26, 2026, 21:25 UTC. Ingestion is not an independent editorial investigation.

Verified by Have I Been Pwned. Breach date: 2025-10-30; loaded 2026-02-16. Exposed data: Charitable donations, Dates of birth, Email addresses, Genders, Income levels, Job titles, Names, Physical addresses, Religions, Salutations, Spouses names. Counts are accounts in the loaded data, not necessarily distinct people.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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