root@thehacksparrow:~/writeups$ SYSTEM ONLINE
root@sparrow:~/writeups$ cat vncviewer.md
// Shells & Pivoting

vncviewer

22 Jul 2026 · 1 min read

vncviewer is a client for the VNC (port 5900) protocol that provides remote graphical access to a machine, similar to RDP but cross-platform.

TypeCLI/GUI
Default port5900
vncviewer cheat sheet

Usage

vncviewer 192.168.1.27:5900

Once connected it will ask for a password. If you don't have one, Metasploit has specific auxiliary modules for VNC (password brute force, null-auth detection) — look for them with search vnc in msfconsole.

Responsible use

These commands are for systems you own or have explicit written authorisation to test (labs, CTFs, contracted engagements). Using them against third-party infrastructure without permission is illegal in most countries.