Clicking in the link I get the following:
Shortly, VicRoads will directly contact impacted customers to confirm their licence details have been flagged on the Victorian Licensing Registry and when they can expect to receive their new card.
and
This will be a centrally-managed process for impacted Victorians customers. You do not need to do anything, but VicRoads requests that you update your current address if you have recently moved.
That seems to me that VicRoads has my details and whether compromised.
Of course it might be different in other states, but while I’m not happy about the breach, I can now understand why they have waited to sort everything out and streamline the process.