Origin Energy disclosed a July data breach affecting 900,000 Australians. A corporate investigation identified 160 top-risk exposure incidents. Attackers accessed the full bank account details and ID numbers of 60 customers, raising serious concerns about data security.

Origin limited internal access for employees while finalizing its review. The public announcement of the breach was followed by a 14% rise in Origin Energy shares, a move that surprised many observers.

The July data breach affected 900,000 Australians overall. Origin moved to restrict staff access as it finalized the company review. That review confirmed attackers obtained full bank account details and ID numbers for 60 customers.

The 160 highest-risk exposures were identified through the internal review. It is not yet known how the attackers initially breached the system. Origin Energy has not yet detailed what remediation steps it plans to offer those who were affected.

The incident is part of a broader pattern of major data breaches affecting firms in Australia in recent years.