Qantas said on Wednesday it is contacting customers after a cyberattack targeted a third-party customer service platform that stored the personal data of 6 million customers.

Here’s what you need to know.

On Monday June 30, Australia’s largest airline detected “unusual activity” on a third-party platform. It took “immediate steps and contained the system,” according to a statement.

“We are continuing to investigate the proportion of the data that has been stolen, though we expect it will be significant,” Qantas said in that statement. “An initial review has confirmed the data includes some customers’ names, email addresses,........

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