Fortinet FortiWan (formerly AscernLink) before 4.2.5 allows remote authenticated users to obtain sensitive information from (1) a backup of the device configuration via script/cfg_show.php or (2) PCAP files via script/system/tcpdump.php.
The diagnosis_control.php page in Fortinet FortiWan (formerly AscernLink) before 4.2.5 allows remote authenticated users to download PCAP files via vectors related to the UserName GET parameter.
Fortinet FortiWan (formerly AscernLink) before 4.2.5 allows remote authenticated users with access to the nslookup functionality to execute arbitrary commands with root privileges via the graph parameter to diagnosis_control.php.