This indicates an attack attempt against a Stack Buffer Overflow vulnerability in WECON LeviStudio HMI Editor.
The vulnerability is due to an error when the vulnerable software handles a crafted UMP file. A remote attacker can trick an unsuspecting user to open a crafted UMP file and exploit this to execute arbitrary code under the security context of the user.
WECON LEVI Studio HMI Editor v1.8.1 and the prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrades or patches from the vendor.