This update resolves the "NetMeeting Desktop Sharing" security vulnerability in Windows NT® 4.0 and Windows 2000. When Remote Desktop Sharing is enabled, NetMeeting does not handle a particular kind of malformed input string correctly, when it is sent from a client. If an affected computer received such data, it could temporarily cause the NetMeeting application to stop responding and temporarily drive CPU utilization to 100 percent, resulting in the loss of any session that was in progress at the time. Download now to prevent a malicious user from denying or interrupting NetMeeting services.

The NetMeeting application is not enabled by default on a standard Windows 2000 installation.

The NetMeeting application must be downloaded for Windows NT 4.0.

Note NetMeeting uses port 1720 -- if this is blocked on corporate firewalls, intranet users are not vulnerable to an external attack.

For more information about this vulnerability, please read Microsoft Security Bulletin MS00-077. (This site is in English.)

• Windows 2000
• Windows NT 4.0

1. Click Start, point to Settings and then click Control Panel.
2. Double-click Add/Remove Programs.
3. Select Windows 2000 Hotfix (Pre-Sp2) [See Q273854 for more information] and click Change/Remove to uninstall.