Medibank confirms hacker had access to data of all 3.9 million customers

Data breach, which exposed all Medibank, ahm and international student data, could cost health insurer $35m

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Medibank has revealed all of its 3.9 million customers have had their data exposed to a hacker, in a significant escalation of the cyber-attack on the Australian health insurer.

In an update to the Australian Stock Exchange on Wednesday, the company said that since Tuesday's announcement that all customer data may have been exposed, the investigation into the breach has now established the hacker had access to all Medibank, ahm and international student customers' personal data, and significant amounts of health claims data.

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