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Penn hacker claims data on 1.2 million donors and alumni
An SSO compromise led to mass extortion emails.
- Organisation
- University of Pennsylvania
- Disclosed
- 1 November 2025
- Affected
- 1,200,000 (claimed by attacker, unconfirmed)
- Data
- Contact, donation history, net worth estimates
- Attacker
- Unknown
- Severity
- major
- Region
- Global
- Source
- CM Alliance monthly roundup ↗
Cite this
Nuffield Consulting, “Penn hacker claims data on 1.2 million donors and alumni”, The Daily Tech Wire outage & breach log, 1 Nov 2025. https://techwire.nuffieldconsulting.com/incidents/2025-11-01-university-of-pennsylvania-breach/ (retrieved 15 Nov 2026).
This entry summarises public reporting. Please also cite the original source: CM Alliance monthly roundup, https://www.cm-alliance.com/cybersecurity-blog/november-2025-major-cyber-attacks-ransomware-attacks-data-breaches.
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