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TPG Telecom Limited (ASX: TPG) has 'unreservedly apologised' to customers of internet service provider (ISP) subsidiary iiNet following a cyber breach on Saturday that saw its order management system accessed by an unknown third party, likely with stolen account credentials from an employee.
The telco confirms that once the incident was confirmed it removed the unauthorised access to the system, but it appears a list of email addresses and phone numbers was extracted.
TPG claims only "limited personal information" is contained in the e iiNet system which is used to create and track orders for services such as broadband connections.
Early analysis shows the list contained around 280,000 active iiNet email addresses and around 20,000 active iiNet landline phone numbers, in addition to inactive email addresses and numbers.
The company also believes around 10,000 iiNet user names, street addresses and phone numbers were accessed along with around 1,700 modem set-up passwords.
TPG emphasises the order management system does not contain copies or details of identity documents, credit card or banking information.
"TPG Telecom has engaged external IT and cyber security experts to assist with our response to the incident," the company states.
"Early investigations suggest the unauthorised access was gained using stolen account credentials from one employee.
"We unreservedly apologise to our iiNet customers impacted by this incident. We will be taking immediate steps to contact impacted iiNet customers, advise of any actions they should take and offer our assistance. We will also contact all non-impacted iiNet customers to confirm they have not been affected.
"We do not currently have any evidence to suggest an impact to our broader systems or other customers."
TPG shares are down 1.6 per cent this afternoon at $5.235. Before the incident they still had not fully recovered from a nosedive occasioned by an incorrect ASX posting for the company that confused it with TPG Capital Asia, which had announced a $651 million takeover for software firm Infomedia.
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