The first two flaws can be triggered and lead to a buffer overflow condition if the attacker sends to the camera a too-long Wi-Fi SSID parameter or a long encrypted password parameter, respectively.

That’s easy to do as Bluetooth is never disabled after the initial setup of the cameras, and attackers (e.g. burglars) can usually come close enough to them to perform the attack.

Triggering one of these flaws will make the devices crash and reboot.

The third flaw is a bit more serious, as it allows the attacker to force the camera to temporarily disconnect from the wireless network to which it is connected by supplying it a new SSID to connect to.

If that particular SSID does not exist, the camera drops its attempt to associate with it and return to the original Wi-Fi network, but the whole process can last from 60 to 90 seconds, during which the camera won’t be recording.

Source: Burglars can easily make Google Nest security cameras stop recording – Help Net Security