They are used to exploit known vulns to get arbitrary read write, calls. For cheating. Both freebsd kernel exploits and browser exploits.
Also for rooting the console, which makes it way easier to run cracked games. I think I saw a browser being used for getting root access first with PS3 unless I misremember.
Weird to see this is still a thing on the latest console generation. Xbox runs software under HyperV which should make exploitation difficult
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