How to update your PS4 to firmware 5.05 - Wololo.net
Helpful tips on finding a PS4 on 6.72 or a lower firmware! - Hackinformer
Todo sobre el pirateo de PS4: Jailbreak, firmwares compatibles y más | El Output
How to Update PS4 Firmware to 5.05, 6.72, or 7.02 Offline. - YouTube
Are you guaranteed to get a PS4 with firmware 5.05 or lower if you buy it now? - Wololo.net
SALT on Twitter: "🔥Mast1c0re Exploit confirmed working on PS5 Latest firmware 6.50 PS2 arbitrary execution + native PS5 ROP chain , PS4 Tested on firmware 5.05 however should work on latest firmware's