A vulnerability classified as critical was found in Netentsec NS-ASG Application Security Gateway 6.3. This vulnerability affects unknown code of the file /vpnweb/index.php?para=index. The manipulation of the argument check_VirtualSiteId leads to sql injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-257284. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.