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Breathalyzer Cyberattack Leaves Drivers Stranded

CAN’T CATCH A BRAKE

The attack left thousands of DUI-convicted drivers unable to start their cars.

A motorist blows into a Drager Alcotest type breathalyzer as part of an alcohol test in Etoile sur Rhone, France, on April 25, 2025. The Prefect of Drome calls for the strengthening of road controls by law enforcement, including the national gendarmerie, following a sharp increase in the mortality rate on the roads. (Photo by Nicolas Guyonnet / Hans Lucas via AFP) (Photo by NICOLAS GUYONNET/Hans Lucas/AFP via Getty Images)
NICOLAS GUYONNET/Hans Lucas/AFP via Getty Images

A cyberattack on one of America’s largest court-mandated breathalyzer companies left thousands of drivers with DUI convictions stranded—unable to start their vehicles after the hack knocked out the back-end systems their cars depend on to function. Intoxalock provides in-car breath tests to drivers ordered by courts to use them as a condition of getting back behind the wheel. Fail the test, and the car won’t start. But when the company’s systems went down following the unspecified attack, drivers were left locked out regardless of whether they were sober. In a post on their website Sunday evening, the company said its systems had been restored. The incident is the latest in a growing wave of ransomware and cyberattacks hitting infrastructure that was never designed to be internet-connected. Whole Foods was left unable to stock its shelves after one such attack last year. France’s postal service was brought down around Christmas. The British Library was disrupted for over two years following a major hack in 2023.

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