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44 disclosed this week · 26,355 on record

Weill Cornell Medicine

Disclosed Nov 12, 202125,697 affectedConfirmed

Official notice

The covered entity (CE), Weill Cornell Medicine, reported that several employees were the victims of an email phishing scheme that affected the protected health information (PHI) of 25,697 individuals. The PHI involved included names, dates of birth, postal addresses, email addresses, medical record numbers, health insurance information, diagnoses, medications prescribed, Social Security numbers, and other treatment information. The CE notified HHS, affected individuals, and the media. In its mitigation efforts, the CE implemented additional administrative, technical, and security safeguards to better protect its PHI. In addition, the CE retrained its workforce members on the proper methods of identifying fraudulent email communications.

What is known

People affected25,697 (as reported to HHS)
DisclosedNov 12, 2021
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at Weill Cornell Medicine

History of this record
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.

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