Devices like Synology or QNAP NAS boxes allow users to share photo galleries via web servers. If a user creates a shared album called "Bedroom" and the NAS generates an index.shtml file, Google will index it. This results in public access to personal photos that the user thought were private.
Often, the .shtml file is located in a directory like /cgi-bin/view/index.shtml. Attackers will modify the URL to attempt directory traversal: inurl view index.shtml bedroom
Why does this happen? By default, a web server (like Apache or Nginx) looks for index.html, index.php, or index.shtml. If those files are missing, the server often displays a directory index (a list of all files in that folder) unless the admin has disabled Options -Indexes. Devices like Synology or QNAP NAS boxes allow
The Vulnerability Chain:
When you search inurl: view index.shtml bedroom, Google is effectively showing you every server where the "bedroom" string appears in the URL path of a directory listing that was supposed to be hidden. When you search inurl: view index