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 0x5228 IOCTL in the Kernel subsystem. A stack-based buffer overflow vulnerability exists in a call to sprintf with the AlarmMessage parameter. An attacker can use this vulnerability to execute arbitrary code in the context of an administrator of the system.