CVE-2005-1184: Microsoft Windows 2000

Medium severity, CVSS 5.0. EPSS: 32.7% chance of exploitation in the next 30 days.

The TCP/IP stack in multiple operating systems allows remote attackers to cause a denial of service (CPU consumption) via a TCP packet with the correct sequence number but the wrong Acknowledgement number, which generates a large number of "keep alive" packets. NOTE: some followups indicate that this issue could not be replicated.

Affected products

• Microsoft Windows 2000: any version
• Microsoft Windows 2003 Server: version datacenter_64-bit only; version enterprise only; version enterprise_64-bit only; version r2 only; version standard only; version standard_64-bit only; …
• Microsoft Windows 98se: any version
• Microsoft Windows Nt: version 4.0 only
• Microsoft Windows XP: any version

Published 2005-05-02. Last modified 2026-06-16.