The string is a "Google Dork," a specific search query used to find unsecured web-connected devices—most commonly older Panasonic network cameras . In the context of a "hotel 2021" report, this refers to a significant privacy vulnerability where hotel surveillance feeds were publicly accessible due to poor security configurations. Executive Summary of the Vulnerability
While camera exposure has been an issue for years, 2021 saw a massive spike in IoT (Internet of Things) security awareness. Researchers identified major vulnerabilities in widely used camera SDKs, such as the ThroughTek Kalay P2P SDK inurl viewerframe mode motion hotel 2021
: This keyword narrows the search to cameras located on hotel premises, such as lobbies, hallways, or even more private guest areas. inurl:ViewerFrame