<ul><li>Yale New Haven Health (YNHHS) announced that threat actors stole the personal data of 5.5 million patients in a cyberattack.</li><li>Yale New Haven Health (YNHHS) disclosed a data breach that exposed personal information of 5.5 million patients.</li><li>On March 11, 2025, YNHHS faced a cybersecurity incident affecting IT services, which was contained with help from cybersecurity firm Mandiant.</li><li>The stolen data includes personal information such as full name, date of birth, home address, telephone number, email address, race/ethnicity, Social Security number, patient type, and medical record number.</li></ul>

Yale New Haven Health (YNHHS) data breach impacted 5.5 million patients

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