Cyberattack on Optus potentially exposes millions of customer accounts

SYDNEY – A cyberattack on one of Australia’s largest telecommunications companies could have accessed the personal information of 9.8 million customers, in what a lawmaker has called the largest data breach in years. .

Optus, an Australian unit of Singapore Telecommunications Ltd., said it did not yet know who was behind the cyberattack that may have revealed customer information dating back to 2017, including names, dates of birth and phone numbers. The company, which said it first became aware of the breach on Wednesday, said some identity documents may also have been compromised.


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