Data Breaches
Confirmed breach reports with impact analysis and lessons for IT practitioners.
Oracle Health Breach: Patient Data from 140+ US Hospitals Stolen and Sold
A threat actor breached Oracle Health's legacy Cerner servers and exfiltrated patient data from over 140 US healthcare organizations, demanding ransoms from individual hospitals while selling data to other buyers.
This is the largest healthcare data exposure in 2025 so far — if your hospital uses or has migrated from Cerner, confirm your data residency and contact Oracle Health immediately.
Change Healthcare Confirms 100M+ Affected in ALPHV/BlackCat Ransomware Attack
UnitedHealth Group confirmed the Change Healthcare ransomware attack affected over 100 million Americans — the largest healthcare data breach in US history — with full restoration taking nearly a year.
This breach established that a single third-party healthcare clearinghouse compromise can halt prescriptions, claims processing, and care delivery for the entire US healthcare sector.