How to Protect Yourself from Camera and Microphone Hacking

There have long since been rumors of possible camera and microphone hacking opportunities on Apple devices, leading Apple to disable the Walkie Talkie audio chat feature in Apple – a vulnerability in apple’s system. The video and audio chatting app Zoom also experienced a flaw in its system where users who deleted the app could receive a video call and open it. Very well-directed advertisements added fear into those who believed they were being listened to a recorded. Here are a few tips to stay safe on your devices:

• When possible, use online features instead of downloading an app, such as for Skype and Zoom which both fully have their in-app features online also; this will decrease an individual’s attack surface, in turn reducing the number of vulnerabilities for hackers to latch on to. 
• Check your device’s ‘permissions and privacy’ settings! Many apps request permission to access one’s camera, microphone, location, etc.; knowing what permissions are enabled and disabling the ones that are unnecessary will reduce the amount of direct connections there are to a device.
• Always check for updates, for manufacturers will often issue updates to ensure better privacy features (especially when flaws are identified), and keep devices and apps up to date.
• An easy and additional method to protect your privacy is to seal your laptop/computer/device cameras with a sticker or tape; it is not as effective on microphones, so trying a microphone blocker/plug may be more helpful.

Reference :

https://www.consumerreports.org/privacy/how-to-protect-yourself-from-camera-and-microphone-hacking/