Pasted

$ nmap  -p 5900 1.2.3.4 --script-args vulns.showall --script ~/vncinfo.nse
 Starting Nmap 7.40 ( https://nmap.org ) at 2017-03-16 11:38 GMT
Nmap scan report for 1.2.3.4
Host is up (0.00073s latency).
PORT     STATE SERVICE
5900/tcp open  vnc
| vncinfo:
|   Protocol version: 3.8
|   Security types:
|     Tight (16)
|   Tight auth subtypes:
|     None
|_  WARNING: Server does not require authentication
 Nmap done: 1 IP address (1 host up) scanned in 0.82 seconds
 $ nmap  -p 5900 1.2.3.4 --script-args vulns.showall --script ~/vnctitle.nse
 Starting Nmap 7.40 ( https://nmap.org ) at 2017-03-16 11:39 GMT
Nmap scan report for 1.2.3.4
Host is up (0.00074s latency).
PORT     STATE SERVICE
5900/tcp open  vnc
 Nmap done: 1 IP address (1 host up) scanned in 5.29 seconds