Backdoors are not always a danger!
they might be created by your sofware providers to help them troubleshootings in future or such a thing. But it is also an easy known rout for hackers to access your critical data, install other maleware on the system, Steal data, Download additional files, run tasks and proccesses, Control the device remotely, Download or upload files, Perform DDoS attacks on other computers, Change computer settings, including passwords and user credentials, Shut down, restart, or even “brick” the device...
These attacks extremely difficult to detect. In fact, many users won't be aware of existing and trouble in their system for a short or long time before an attack happens.
However, there are strategies we can use to reduce the risk of a breach.