This indicates an attack attempt to exploit a Memory Corruption vulnerability in Oracle Java.
The vulnerability is due to an error when the vulnerable software handles a crafted webpage. An attacker can exploit this by tricking an unsuspecting user into visiting a malicious webpage and execute arbitrary code within the context of the logged in user.
Oracle Java SE 5.0u75 and prior
Oracle Java SE 6u85 and prior
Oracle Java SE 7u72 and prior
Oracle Java SE 8u25 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.