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QuadRooter is a set of four vulnerabilities affecting Android devices built using Qualcomm chipsets. If any one of the four vulnerabilities are exploited, an attacker can trigger privilege escalations for the purpose of gaining root access to a device.


Qualcomm is an American telecommunications company. Qualcomm designs and markets wireless telecommunications products and services.

Quality of service

The ability to provide different priorities to different applications, users or data flows, or to guarantee a certain level of performance to a data flow.


QuickTime is an extensible multimedia framework developed by Apple, capable of handling various formats of digital video, picture, sound, panoramic images, and interactivity.