Recent PS4 firmware CFW 7.55 can be successfully hacked. PS4 has been hackable for years, although not all consoles are compatible with it. To be able to do so, it is necessary not to have updated the console to newer firmware versions, and to have one with an older version in which an exploit is discovered. Now, pre-August 2020 consoles that are not updated can be hacked.
In early 2018, an exploit was found in the PS4 kernel that, along with another exploit in WebKit that allowed code to be entered to exploit it, managed to jailbreak PlayStation 4. To do so, it was only necessary to have a 4.55 or earlier version of the firmware. Gradually progress has been made with new exploits, where the most recent one allowed hacking consoles with firmware 7.02 or earlier.
If your PS4 has firmware 7.55 or earlier, you can install it
Now, it is also possible to jailbreak PS4s that have firmware 7.50 or earlier. If you have a later version, you will have to wait for other exploits to be discovered in the future, as it is not possible to downgrade. It was hacker sleirsgoevy who released the jailbreak for PS5 version 7.50, based on the IPv6 UAF kernel exploit revealed by TheFloW in January.
When the jailbreak was announced last Saturday, it was only guaranteed to work with consoles running version 7.50. However, the Mira CFW released today already allows it to run on PS4 firmware versions 7.50, 7.51, and 7.55. The Webkit exploit is very unstable, and running it successfully can require up to ten attempts to run correctly without displaying a PS4 error code.
PS4 version 7.55 was released in August 2020. Its successor, version 8.00, did not arrive until October 2020. Therefore, any PS4 console that has not been updated since September 2020 can install this new CFW version, although some people do not consider Mira as a CFW. We remind you that it is advisable to make a backup of PS4 and that running your account on a modified console can lead to you being banned and losing all your games.
PS5, to prevent such exploits, does not have a web browser, which is one of the entry points for kernel exploits. PS4, therefore, can be hacked relatively easily as long as we have not updated the firmware. The situation is different with Xbox One, which has been the first console that has not been hacked, and there is no way to emulate its games, either because of how well protected the console is or because of the lack of interest in doing so, since all its games are also available on PC.