The rear defroster or related electrical wiring in the rear glass/liftgate area appears to have malfunctioned and shorted, causing a fire while the vehicle was parked, turned off, and unattended. The fire resulted in the rear glass shattering/blowing out. The incident was recorded on a residential security camera. This posed a significant safety risk because the fire started while the vehicle was off, creating danger to occupants, bystanders, nearby vehicles, and surrounding property. There were no prior warning indicators, messages, or symptoms known before the failure. A dealership has inspected the vehicle and provided a repair estimate consistent with failure in the rear defroster/rear glass area. The vehicle and damaged components should be available for inspection. Based on the observed damage and location of the fire, this appears to be an electrical short involving the rear defroster system or related wiring.