CVE-1999-0224
Description
A long username in the Windows NT messenger service can cause a denial of service, crashing the system.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
A long username in the Windows NT messenger service can cause a denial of service, crashing the system.
Vulnerability
The Windows NT messenger service is vulnerable to a denial of service when it processes a username that is excessively long. This vulnerability affects Windows NT and potentially Windows 95 systems.
Exploitation
An attacker can crash a vulnerable Windows NT or Windows 95 system by sending a Winpopup message with an extremely long username. This can be achieved remotely, for example, from a UNIX system using the smbclient utility with a crafted username [1].
Impact
Successful exploitation of this vulnerability results in a denial of service, causing the affected system to crash.
Mitigation
No specific patch information or fixed version is available in the provided references. Users are advised to disable the messenger service if it is not required. Further mitigation details are not yet disclosed in the available references.
AI Insight generated on Jun 5, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
6cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*+ 5 more
- cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_nt:4.0:sp1:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_nt:4.0:sp2:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_nt:4.0:sp3:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_nt:4.0:sp4:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_nt:4.0:sp5:*:*:*:*:*:*
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1News mentions
0No linked articles in our index yet.