MediSecure, an Australian prescription service, reported a massive data breach affecting 12.9 million citizens.

Hackers accessed 6.5 terabytes of data, including names, phone numbers, addresses, Medicare numbers, and medication details.

The breach led to MediSecure entering voluntary administration in June due to high costs of identifying victims.

National Cyber Security coordinator assured the public that prescription services were unaffected.

Coordinator warned against accessing stolen information on the dark web.

The government confirmed that eRx, the national prescription delivery service, was not impacted.

Users were cautioned about potential scammers using their stolen data for fraudulent activities.

This incident is part of a series of cyberattacks on major Australian companies, including Optus and Medibank, in recent years.