The vulnerability is caused due to the application loading a library

(riched20.dll.dll) in an insecure manner. This can be exploited to

load arbitrary libraries by tricking a user into e.g. opening a e.g.

".pcap" file located on a remote WebDAV or SMB share.
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of WECON LeviStudio. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists in the handling of LeviStudio Project files. By providing an overly long HmiSet Type XML attribute, an attacker can overflow a stack-based buffer and execute arbitrary code in the context of the current process.