Com.sec.facatfunction – Top

The package com.sec.facatfunction —often displayed as or FacATFunction in system apps—is a default application pre-installed on Samsung Galaxy smartphones and other devices. The "sec" in its name indicates its origin from Samsung Electronics, and it is widely believed to be tied to Samsung's security ecosystem, possibly part of the Samsung Knox framework.

This innocuous package has recently been in the spotlight due to several high-severity security flaws discovered in 2026. com.sec.facatfunction