Android based smartphones from vendors such as Ulefone and Krüger&Matz contain com.pri.factorytest application preloaded onto devices during manufacturing process. The application com.pri.factorytest (version name: 1.0, version code: 1) exposes a ”com.pri.factorytest.emmc.FactoryResetService“ service allowing any application to perform a factory reset of the device. Application update did not increment the APK version. Instead, it was bundled in OS builds released later than December 2024 (Ulefone) and most probably March 2025 (Krüger&Matz, although the vendor has not confirmed it, so newer releases might be vulnerable as well).
The Android application exports a component for use by other applications, but does not properly restrict which applications can launch the component or access the data it contains.
The attacks and consequences of improperly exporting a component may depend on the exported component: