Integer overflow in kvolefio.dll 8.5.0.8339 and 10.5.0.0 in the Autonomy KeyView Filter SDK, as used in IBM Lotus Notes 8.5, Symantec Mail Security for Microsoft Exchange 5.0.10 through 5.0.13, and other products, allows context-dependent attackers to execute arbitrary code via a crafted OLE document that triggers a heap-based buffer overflow.