backdoor entry

Translations
нелегальный вход
The hackers found a backdoor entry into the system.
Хакеры нашли нелегальный вход в систему.
Definitions
A backdoor entry refers to a method of bypassing normal authentication or security measures to gain unauthorized access to a system, network, or physical location. This term is often used in the context of computer security, where a backdoor may be a hidden feature or vulnerability that allows an attacker to exploit a system without detection.
Words
backdoor

adjective
тайный
entry

noun
вход