This indicates an attack attempt against a buffer-overflow vulnerability in Autonomy KeyView Module.
The vulnerability is caused by an error when the vulnerable software handles crafted HTML tags. It allows a remote attacker to execute arbitrary code via sending a crafted web page.
Autonomy Keyview Viewer SDK 10.3 and later versions
Autonomy Keyview Filter SDK 10.3 and later versions
Autonomy Keyview Export SDK 10.3 and later versions
System Compromise: Remote attackers can gain control of vulnerable systems.
Upgrade to version 10.4, available from the vendor web site: