Apple has found itself forced to release an emergency update after it mistakenly facilitated hackers to break the limitations of the latest version of its iOS operating system.

In July, Apple released iOS 12.4, an update that included an old bug that Apple had previously fixed. The hackers realized Apple's mistake and released a program to break the protection of the iPhone, called Jail Break, the first time in years that it was possible to use the program Jail Break to break the protection of the iPhone.

Apple on Monday released iOS 12.4.1, which fixes the bug again.

Specialized security researchers warned that hackers could have used the old bugs that were re-introduced by Apple to hack iPhone users.

An information security researcher said anyone could use the old vulnerability that was re-introduced by Apple "to hack any updated iPhone."

Apple did not immediately respond to requests for comment, and thanked the company a researcher from Google found the original error, and also thanked the hacker "Pwn20wnd", who developed the programming of breaking the protection "generation break" again.