A cybersecurity attack on an Iowa-based company has resulted in widespread vehicle startup failures across the United States, affecting drivers who rely on interlock devices for their vehicles to operate.

The incident involved hackers breaching systems operated by the Iowa company, which manages interlock devices that require regular calibration to keep vehicles functional. When these devices are not calibrated within specified timeframes, the affected vehicles become inoperable as a safety mechanism.

The attack disrupted the normal calibration process, leaving drivers unable to complete required maintenance on their interlock systems. As a result, numerous vehicles failed to start when the devices automatically disabled the ignition systems due to missed calibration deadlines.

Interlock devices are commonly installed in vehicles as part of legal requirements, typically following certain driving violations. These systems require drivers to provide breath samples and undergo regular calibration to ensure proper functioning and compliance with court orders or state regulations.

The scope of the disruption appears to extend nationwide, affecting drivers in multiple states who depend on the Iowa company's services for their vehicle interlock systems. The incident highlights the vulnerability of connected automotive systems to cyber attacks and the potential for widespread transportation disruptions when centralized services are compromised.