A major cybersecurity incident has exposed sensitive personal, medical and financial records of more than half a million Americans.

In a data breach notification, the Office of the Maine Attorney General says the California-based non-profit organization NorthBay Healthcare Corporation experienced an external system breach affecting 569,012 Americans.

In a notice sent to affected people, NorthBay Health says an unauthorized entity gained access to the firm’s computer systems between January 11th, 2024 and April 1st of the same year.