The Leagoo Power 5 Android device with a build fingerprint of LEAGOO/Power_5/Power_5:8.1.0/O11019/1532686195:user/release-keys contains a pre-installed app with a package name of com.mediatek.wfo.impl app (versionCode=27, versionName=8.1.0) that allows any app co-located on the device to modify a system property through an exported interface without proper authorization.