Trading in the company’s shares were halted this morning after it said it had detected an unauthorised third-party acted illegally to access its internal Microsoft 365 back-office system.

It follows the high-profile data breaches at major corporations like Medicare and Optus, but Tech One said its customer-facing platform was not breached.

“The company has acted with urgency to investigate the issue, including initiation of its cyber response strategy, appointing third party experts and isolating affected systems,” the company said.

“The company has reported this incident to relevant authorities and continues to not only comply but go beyond its regulatory obligations.

“Once the investigation is further progressed we will be in a position  to contact those who may be affected to work with them on the ongoing safety of their data.”