Telstra data breach two weeks after massive cyber attack on Optus

Australia's largest telecommunications company Telstra said it suffered a small data breach. Just two weeks ago, Telstra's main rival Optus suffered a massive cyber attack. Telstra has 18.8 million customer accounts, equivalent to three-quarters of Australia's population. The company said the intrusion by a third-party agency exposed some employee data dating back to 2017.

Telstra said in an internal employee email that the number of currents and former employees affected was 30,000.

A company spokesperson said in a statement that the stolen data was "very basic," limited to names and email addresses. "We believe this information is now being leaked to profit from Optus' vulnerabilities, " the spokesperson added.

Telstra did not comment on the number of people affected or when the intrusion occurred but said it only affected current and former employees.

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