This indicates an attack attempt against a Buffer Overflow vulnerability in Delta Industrial Automation WPLSoft.
The vulnerability is caused by an error when the vulnerable application handles a malformed DVP file. A remote attacker may be able to exploit this to execute arbitrary code on vulnerable systems via a crafted DVP file.
Delta Industrial Automation WPLSoft v2.31 and the prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.