This indicates an attack attempt to exploit a Buffer Overflow vulnerability in Tftpd32 DNS Server.
The vulnerability is due to an improper boundary check condition in the application. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application or possibly cause a denial of service condition.
Philippe Jounin TFTPD32 v4.00
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are not aware of any vendor supplied patch for this issue.