Newspaper Fairfax Wednesday found that a Google search could easily get to Telstra spreadsheets, obtaining customer names, telephone numbers, and even business and home addresses, reported Xinhua.
More than 1,600 customer records were leaked in one of the spreadsheets, which contained Telstra customers' personal details. A further three spreadsheets contained over 8,200 customer records, according to Fairfax.
Telstra removed access to the data soon after being notified by Fairfax.
The company issued a formal apology to affected customers Friday, saying an investigation is underway.
Peter Jamieson, Telstra executive director of customer service, said the breach was "concerning" and "unacceptable", vowing to take all steps to ensure they protect further information.
Australian IT security researchers warned that the customer data may potentially be used by someone with malicious intent to obtain more customer information by pretending as a Telstra call center representative.
--IANS (Posted on 17-05-2013)