Google Search Dork: "VNC Desktop" inurl:5800
VNC is a remote-controlled desktop product. Depending on the configuration, remote users may not be presented with a password. Even when presented with a password, the mere existance of VNC can be important to an attacker, as is the open port of 5800.
"VNC Desktop" inurl:5800 Google Dork Source : "VNC Desktop" inurl:5800