The HK1 Box S905X3 TV Box contains a vulnerability that allows a local unprivileged user to escalate to root using the /system/xbin/su binary via a serial port (UART) connection or using adb.
https://www.securitylab.ru/news/513051.php
https://www.cybersecurity-help.cz/vdb/SB2020101404
https://threatpost.com/authentication-bug-android-smart-tv-data-theft/160025/
https://sick.codes/sick-2020-004/
https://github.com/sickcodes/security/blob/master/advisories/SICK-2020-004.md
Source: Mitre, NVD
Published: 2020-11-05
Updated: 2026-06-17
Base Score: 7.2
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
Severity: High
Base Score: 7.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.0008