No. Using Google operators is legal. However, that you are not authorized to view may violate laws in your jurisdiction (e.g., Computer Fraud and Abuse Act in the US, GDPR in Europe, Surveillance laws).
The increasing use of IP cameras and network video recorders (NVRs) has raised concerns about their security. A specific vulnerability in the ViewerFrame mode of certain IP cameras could potentially allow unauthorized access to the camera feed or control over the device. This write-up discusses the potential risks and provides mitigation strategies to minimize exposure. inurl viewerframe mode motion my location top