This indicates an attack attempt to exploit a Buffer Overflow vulnerability in Enterasys NetSight.
The vulnerability is due to an improper boundary check condition in the application when handling a long PRIO field in a message. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted request.
Enterasys NetSight 126.96.36.199 and prior versions
System Compromise: Remote attackers can gain control of vulnerable systems.
update to 188.8.131.52 or higher version