CDK Global shares when systems will be back up amid cyberattack outage

CDK Global told its car dealership clients Tuesday that the software tools powering their businesses will likely remain unavailable for the remainder of the month after the company was hacked, causing a system-wide outage. 

The announcement comes one full week after the initial CDK cyberattack, which the company is calling a "ransom event," crippling 15,000 auto dealers across the U.S.

"We do feel it's important to share that we do not believe we will able to get all dealers live prior to June 30," CDK Global said in a recorded message on a help line and in a memo sent to dealerships Tuesday.