Quadrooter is a set of four privilege escalation vulnerabilities that may affect up to 900 million devices running Qualcomm chips. The flaws let attackers access saved data, change or remove system files, delete or add apps, and access virtually all phone services. The vulnerabilities were quickly identified and addressed by both the manufacturer and Google, but the proof of concept here is worrisome. Its a warning to developers and manufacturers alike: No segment of the mobile ecosystem is beyond the reach of motivated malware-makers.”]