A crash was observed in Microsoft Office 2007 with Microsoft Office File Validation Add-In disabled and Application Verifier enabled for testing and reproduction. This bug also reproduced in Office 2010 running on Windows 7 x86. The crash is caused by a 1 bit delta from the original file at offset 0x4A45. OffViz identified this offset as OLESSRoot.DirectoryEntries[100].OLESSDirectoryEntry[20].sidLeft with an original value of 0x00000000 and a fuzzed value of 0x00008000.