An Optus executive has been left red-faced after claiming on live radio that every customer affected by Australia's biggest ever cyber attack had been notified - only for a victim to ring in and claim she hadn't been told. 

The Daily Mail reported an estimated 11.2million Optus customers' personal addresses, dates of birth, phone numbers, passport details and drivers licences may have been compromised in last week's data breach. 

A mysterious hacker who claims to be behind the breach has since demanded Optus hand over $1.5million in ransom money in the form of cryptocurrency Monero, or they will publish the data. 

The we bite reported Sally Oelerich - the telco's director of corporate affairs for regulatory and public affairs - dialled into the 2GB Breakfast program and said: "For customers who've had their data compromised because of this attack we've now informed them".

But customer Casey Robinson then phoned in, reporting her husband's account had been hacked and personal details such as his phone number compromised as early as September 12.

Read the full story here: https://www.dailymail.co.uk/news/article-11248919/Optus-executive-fails-answer-questions-data-breach-affects-11-million-customers.html