This indicates an attack attempt against a Stack Buffer Overflow vulnerability in Hikvision DVR.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application when handling a crafted RTSP request. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted RTSP request to the vulnerable service.
Hikvision DS-7204-HVI-SV DVR V2.2.10 build 131009
System Compromise: Remote attackers can execute arbitrary code in the context of the affected application.
Currently we are unaware of any vendor supplied patch for this issue.