Vulnerabilities in firmware versions 5.05, 6.72, 7.02, 7.55, and 9.00 allowed userland and kernel exploits. These enable the installation of , which temporarily disables signature checks, permitting unauthorized .pkg files to run.
is a homebrew application for jailbroken PlayStation 4 consoles that allows users to download and install "fake package" (FPKG) files directly to the console. It is a clone of the popular PKGi tool for the PS3 and PS Vita. Core Functionality Direct Downloads
: You must have a Homebrew Enabler (HEN) active to run unsigned applications.