A vulnerability in the client update process of Cisco Secure Client Software for Windows could allow a low-privileged, authenticated, local attacker to elevate privileges to those of SYSTEM. The client update process is executed after a successful VPN connection is established. This vulnerability exists because improper permissions are assigned to a temporary directory that is created during the update process. An attacker could exploit this vulnerability by abusing a specific function of the Windows installer process, such as the `vpndownloader.exe` process, which creates a directory in `c:windowstemp` with default permissions. A successful exploit could allow the attacker to execute code with SYSTEM privileges, potentially allowing for arbitrary file deletion as the NT AuthoritySYSTEM account.