Searching for indexframe.shtml is a well-known method for finding cameras exposed to the internet. Historically, these devices were vulnerable to several critical issues:
While "dorking" typically finds devices with poor configuration, recent research by firms like has identified high-severity flaws in the Axis Remoting inurl+indexframe+shtml+axis+video+server+fixed
Translating the + signs (which act as spaces in URLs) into standard Google search operators: Searching for indexframe