Security Flaw Found in KARR and SWDS Anti-Theft Devices, Affecting Millions of Vehicles

San Diego, CA, August 20, 2026 —

Researchers at the University of California San Diego have discovered a significant security vulnerability within KARR and SWDS anti-theft devices, potentially compromising the security of millions of vehicles across Southern California.

The flaw, identified by the university’s researchers, could permit unauthorized remote access to vehicles equipped with these anti-theft systems. Potential malicious actions include remotely unlocking vehicle doors, activating the car’s horn, flashing the lights, or even disabling the vehicle entirely.

As of the latest information, there have been no reported instances of this vulnerability being exploited in the wild. However, the researchers strongly advise all drivers who have KARR or SWDS anti-theft devices installed in their vehicles to apply a critical security update without delay. This recommendation applies even if the anti-theft device is not currently active.

The root cause of the vulnerability is attributed to a shared security key that is universally implemented across these devices. This common key, according to the findings, could affect an estimated total of over two million vehicles in the Southern California region that utilize either KARR or SWDS anti-theft technology.

Further details regarding the specific technical nature of the vulnerability or the exact timeline for the availability and implementation of the security update were not immediately provided. Vehicle owners are encouraged to consult with their device manufacturer or installer for the most current information and guidance on securing their vehicles.

Story summarized from the original created by Sergio Flores on www.nbcsandiego.com, see more information here.

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