Microsoft has released a patch that fixes a recently discovered issue with cross frame security in Internet Explorer. You can read more about the problem, but first let's give you the fix.

If you don't see our recommendation for your computer in a yellow box above this paragraph, you can select a patch in the following section. You can also read Do you need the patch? on the next page to find out how to determine if your system needs a patch.

Whose computer is at risk?
Here is a list of operating systems and fixes for the English language only. (International language versions will be available soon.)

Windows 98

•

Internet Explorer 4.01 Service Pack 1: At risk. Go to Windows Update, click Product Updates, and select the Microsoft Internet Explorer "Cross Frame Navigation" security update under Critical Updates.

Windows 95 and Windows NT 4.0

•		Internet Explorer 4.01 and 4.01 Service Pack 1: At risk. Download the patch now.
•		Internet Explorer 4.0 and 3.x: At risk. Patches are available only for Internet Explorer 4.01. We recommend that you download the latest version of Internet Explorer 4.0 (which is version 4.01 and includes Service Pack 1) and return to this page to download the patch.

Windows 3.1, Windows 3.11, and Windows NT 3.51

•		Internet Explorer 4.01 At risk. Download the patch now.
•		Internet Explorer 3: At risk. Patches are available only for Internet Explorer 4.01. We recommend that you download the latest version of Internet Explorer 4 and return to this page to download the patch.

Windows NT for DEC Alpha

•		Internet Explorer 4.01 and 4.01 Service Pack 1: At risk. Download the patch now.
•		Internet Explorer 4.0: At risk. Patches are available only for Internet Explorer 4.01. We recommend that you download the latest version of Internet Explorer 4 (which is version 4.01 and includes Service Pack 1) and return to this page to download the patch.

Macintosh

•		Internet Explorer 4.01: At risk. Download the patch now.
•		Internet Explorer 4.0 and 3.01: At risk. Patches are available only for Internet Explorer 4.01. We recommend that you download Internet Explorer 4.01 and return to this page to download the patch.
•		Internet Explorer 3.0: Not at risk.

UNIX (Solaris and HP-UX)

•

Internet Explorer 4.0: Not at risk.