On Draytek Vigor3900, Vigor2960, and Vigor 300B devices before 1.5.1.1, there are some command-injection vulnerabilities in the mainfunction.cgi file.

In Draytek Vigor3900 1.5.1.3, attackers can inject malicious commands into mainfunction.cgi and execute arbitrary commands by calling the restore function.

In Draytek Vigor3900 1.5.1.3, attackers can inject malicious commands into mainfunction.cgi and execute arbitrary commands by calling the modifyrow function.

In Draytek Vigor3900 1.5.1.3, attackers can inject malicious commands into mainfunction.cgi and execute arbitrary commands by calling the doPPPo function.

In DrayTek Vigor3900 1.5.1.3, attackers can inject malicious commands into mainfunction.cgi and execute arbitrary commands by calling the rename_table function.

In Draytek Vigor3900 1.5.1.3, attackers can inject malicious commands into mainfunction.cgi and execute arbitrary commands by calling the doIPSec function.

DrayTek Vigor3900 v1.5.1.6 was discovered to contain an authenticated command injection vulnerability via the name parameter in the run_command function.

DrayTek Vigor3900 v1.5.1.6 was discovered to contain an authenticated command injection vulnerability via the value parameter in the filter_string function.