The Load method in the Chart component of Office Web Components (OWC) 9 and 10 generates an exception when a specified file does not exist, which allows remote attackers to determine the existence of local files.

The "XMLURL" property in the Spreadsheet component of Office Web Components (OWC) 10 follows redirections, which allows remote attackers to determine the existence of local files based on exceptions, or to read WorkSheet XML files.

The "ConnectionFile" property in the DataSourceControl component in Office Web Components (OWC) 10 allows remote attackers to determine the existence of local files by detecting an exception.

The Host function in Microsoft Office Web Components (OWC) 2000 and 2002 is exposed in components that are marked as safe for scripting, which allows remote attackers to execute arbitrary commands via the setTimeout method.

The LoadText method in the spreadsheet component in Microsoft Office Web Components (OWC) 2000 and 2002 allows remote attackers to read arbitrary files through Internet Explorer via a URL that redirects to the target file.

Microsoft Office Web Components (OWC) 2000 and 2002 allows remote attackers to bypass the "Allow paste operations via script" setting, even when it is disabled, via the (1) Copy method of the Cell object or (2) the Paste method of the Range object.