Microsoft Windows NT 4.0 Unsupported Installation Detection

critical Nessus Plugin ID 19699
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote host is running a version of Microsoft Windows that is no longer supported by Microsoft.


The remote host is running Microsoft Windows NT 4.0. This operating system version is no longer supported by Microsoft.

Lack of support implies that no new security patches for the operating system will be released by the vendor. As a result, it is likely to contain security vulnerabilities.


Upgrade to a version of Windows that is currently supported.

See Also

Plugin Details

Severity: Critical

ID: 19699

File Name: smb_win_nt4.nasl

Version: 1.35

Type: combined

Agent: windows

Family: Windows

Published: 9/14/2005

Updated: 9/22/2020

Dependencies: os_fingerprint.nasl, smb_nativelanman.nasl

Risk Information


Risk Factor: Critical

Base Score: 10

Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: cpe:/o:microsoft:windows_nt:4.0

Excluded KB Items: Host/not_windows

Reference Information

IAVA: 0001-A-0026