unauthorized

The security system triggered an alarm when it detected an unauthorized person trying to enter the research lab.

(Chinese) 当安保系统检测到未经授权的人员试图进入研究实验室时，触发了警报。

Hackers gained unauthorized access to the bank's database by exploiting a small vulnerability in the software.

(Chinese) 黑客利用软件中的一个小漏洞，非法访问了银行的数据库。