Amzetta Technologies Amzetta Zportal is a virtual desktop and application controller from Amzetta Technologies, Inc. It is used by administrators to create and manage hosted applications, virtual desktops, shared hosted desktops, and auditing services, provide resources for virtual desktops, proxy connections, and authenticate users and endpoint devices. Amzetta Technologies Amzetta zPortal Windows zClient is vulnerable to an integer overflow vulnerability that could be exploited by an attacker to execute arbitrary code in kernel mode or cause a denial of service via specially crafted I/O request packets.