Australian carrier Qantas has confirmed that customer name, email and residential address details were among data exposed during a cyber attack last week at one of its contact centres.

The carrier on Wednesday (9 July) said data linked to 5.7 million unique customers has been exposed, including approximately 4 million customer records containing name, email address and Qantas frequent flyer details.

An additional 1.3 million exposed customer records also included a combination of residential and business addresses, while 1.1 million records also featured date of birth.

Phone numbers of 900,000 customers and the listed gender of 400,000 customers were also compromised, along with the meal preferences of 10,000 travellers.

¡°There is no evidence that any personal data stolen from Qantas has been released but, with the support of specialist cyber security experts, we continue to actively monitor,¡± the airline said in a statement, reconfirming that no credit card details, personal financial information or passport details were stored in the compromised system.?

¡°Passwords, PINs and login details were not accessed or compromised.?The data that was compromised is not enough to gain access to these frequent flyer accounts.¡±

The carrier said it has begun ¡°progressively emailing¡± affected customers, while a dedicated support service remains available.

¡°Since the incident, we have put in place a number of additional cyber security measures to further protect our customers' data, and are continuing to review what happened,¡± said Qantas Group CEO Vanessa Hudson.

¡°We remain in constant contact with the National Cyber Security Coordinator, Australian Cyber Security Centre and the Australian Federal Police,¡± she added.