Aftermarket car alarm systems developed by Pandora and Viper have been found to be vulnerable to remote exploitation, enabling potential attackers to hijack the vehicles they’re installed on and to spy on their owners. Some of the smart alarms they tested also gave them the ability to listen to all conversations using a microphone installed as part of the alarm system, allowing criminals to also snoop on millions of car owners. Pen Test Partners security researchers gave the two companies behind the vulnerable alarm systems only 7 days to fix the security issues because of the high chance that criminals already were aware and possibly exploiting them in the wild.
Source: https://www.bleepingcomputer.com/news/security/smart-car-alarms-ironically-expose-millions-of-vehicles-to-remote-hijacking/