A 2025 hack of old Cerner servers run by Oracle Health exposed personal and medical information belonging to nearly 20 million people, according to a Texas attorney general report that Bloomberg described on Oct. 5. About 3 million of those people live in Texas. The figure is the first public count for a breach that Oracle privately disclosed to hospital customers in March 2025.
According to the Texas report, the exposed data included Social Security numbers, addresses, and medical information, Gizmodo reported, citing Bloomberg. Hospitals that have notified patients say the details vary by person and may also include treating doctors, diagnoses, medications, and test results.
