Microsoft has released an update that addresses a potential security issue with the implementation of cross-frame security in Microsoft Internet Explorer. Additional information about this issue is available from the following Microsoft Web sites:

•	http://www.microsoft.com/windows/ie/default.mspx (http://www.microsoft.com/windows/ie/default.mspx)
•	http://www.microsoft.com/technet/security/Bulletin/MS98-013.mspx (http://www.microsoft.com/technet/security/Bulletin/MS98-013.mspx)

Updates are available for the following products:

•	Microsoft Internet Explorer 4.01 for Windows 95 and Windows NT 4.0 (x86 and Alpha)
•	Microsoft Windows 98
•	Microsoft Internet Explorer 4.01 for Windows 3.1 and Windows NT 3.51
•	Microsoft Internet Explorer 4.01 for Macintosh

This issue may enable a malicious Web site administrator to read files from a remote computer by circumventing the safeguards that Microsoft has implemented with regard to scripts interacting with other instances of Internet Explorer. Note that Microsoft has not received reports of adverse effects due to this issue.

Update Information by Product:

NOTE: If you are using Internet Explorer 3.x or 4.0, you must install Internet Explorer 4.01 in order to apply this update. You can install Internet Explorer 4.01 with Service Pack 1 from the following Microsoft Web site: Microsoft Internet Explorer 4.01 and 4.01 with Service Pack 1 for Windows 95:

   Updated File Name    Size (bytes)   Date       Version
   ------------------------------------------------------------
   Mshtml.dll           2,413,840      9-02-98    4.72.3509.100

				

Microsoft Internet Explorer 4.01 and 4.01 with Service Pack 1 for Windows NT 4.0 x86:

   Updated File Name    Size (bytes)   Date       Version
   ------------------------------------------------------------
   Mshtml.dll           2,413,328      9-02-98    4.72.3509.100
				

Microsoft Internet Explorer 4.01 and 4.01 with Service Pack 1 for Windows NT 4.0 Alpha:

   Updated File Name    Size (bytes)   Date       Version
   ------------------------------------------------------------
   Mshtml.dll           3,937,552      9-02-98    4.72.3509.200
				

Windows 98:

   Updated File Name    Size (bytes)   Date       Version
   ------------------------------------------------------------
   Mshtml.dll           2,413,840      9-02-98    4.72.3509.100
				

Microsoft Internet Explorer 4.01 for Windows 3.1 and Windows NT 3.51:

   Updated File Name    Size (bytes)   Date       Version
   ------------------------------------------------------------
   Mshtml16.dll         3,084,160      9-02-98    4.01.2509.200
   Urlmon16.dll           351,280      9-02-98    4.01.2509.201