source: https://www.securityfocus.com/bid/60354/info

QNAP VioStor NVR and QNAP NAS are prone to a remote code-execution vulnerability.

Successfully exploiting this issue may allow an attacker to execute arbitrary code with elevated privileges in the context of the user running the affected application.

The following are vulnerable:

QNAP VioStor NVR running firmware 4.0.3.
QNAP NAS 

http://www.example.com/cgi-bin/pingping.cgi?ping_ip=1;whoami