The vulnerability of the doPPPo function in the mainfunction.cgi script of the DrayTek Vigor 3900 router software allows a hacker to execute arbitrary commands.

The vulnerability of the doPPPo function in the mainfunction.cgi script of the DrayTek Vigor 3900 router software exists due to the failure to eliminate special elements used in the operating system commands. Exploiting this vulnerability allows a remote attacker to execute arbitrary commands...