This indicates an attack attempt against a Stack Buffer Overflow vulnerability in HP Data Protector.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application when handling a crafted request with opcode 264. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted request to the vulnerable service.
HP Data Protector 6.21
HP Data Protector 6.20
HP Data Protector 7.01
HP Data Protector 7.00
System Compromise: Remote attackers can execute arbitrary code in the context of the affected application.
Apply the most recent upgrade or patch from the vendor.