https://fail0verflow.com/blog/2018/ps4-cec/.
2018-11-03
PS4 Aux Hax 4: Belize via CEC
This post describes another way to attain code execution on Aeolia (actually, the southbridge revision on PS4 Pro which was used in this case is named “Belize”). This exploit differs from the previously documented method as it does not have the prerequisite of gaining control of the APU. Additionally it is fairly generic and therefor workable on all currently released hardware and software versions of PS4.[…]
Firmware Security 