CVE-1999-1463

Medium CVSS 5

Published 1997-07-10 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-1999-1463, 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

Windows NT 4.0 before SP3 allows remote attackers to bypass firewall restrictions or cause a denial of service (crash) by sending improperly fragmented IP packets without the first fragment, which the TCP/IP stack incorrectly reassembles into a valid session.

Sources

NVD record for CVE-1999-1463

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