This vulnerability allows remote attackers to execute arbitrary code on vulnerable instances of Advantech WebAccess. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of the 0x1388B IOCTL in the BwOpcTool subsystem. A stack-based buffer overflow vulnerability exists in a call to sprintf using the WindowName parameter. An attacker can use this vulnerability to execute arbitrary code in the context of an administrator of the system.