When Internet Explorer accesses a website with the MHTML protocol, Internet Explorer processes the contents as MHTML data, ignoring their actual content types. This behavior may result in executing the scripts embedded in the contents.
The MHTML protocol handler is included in the Outlook Express component, and Microsoft provides the fix of the vulnerability for this component.
An arbitrary script may be executed on the user's web browser.
Update the Software
Apply the latest updates provided by the vendor.
## Products Affected
Some versions of Outlook Express are affected because the vulnerability is contained in the Outlook Express component used by Internet Explorer.