CVE-1999-1222

Medium CVSS 5

Published 1999-12-31 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-1999-1222, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

Netbt.sys in Windows NT 4.0 allows remote malicious DNS servers to cause a denial of service (crash) by returning 0.0.0.0 as the IP address for a DNS host name lookup.

Sources

NVD record for CVE-1999-1222

CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P