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Vulnerability record · CVE-1999-1157 · published 31 December 1999

CVE-1999-1157: Microsoft windows nt vulnerability

Microsoft · Windows Nt

Tcpip.sys in Windows NT 4.0 before SP4 allows remote attackers to cause a denial of service via an ICMP Subnet Mask Address Request packet, when certain multiple IP addresses are bound to the same network interface.

5.0 CVSS 2.0 Medium EPSS 13% · top 3.7%
5.0CVSS 2.0 base score
13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
16 Jun 2026Last modified by NVD

Description

Tcpip.sys in Windows NT 4.0 before SP4 allows remote attackers to cause a denial of service via an ICMP Subnet Mask Address Request packet, when certain multiple IP addresses are bound to the same network interface.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://support.microsoft.com/support/kb/articles/Q192/7/74.ASP PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/3894
http://support.microsoft.com/support/kb/articles/Q192/7/74.ASP PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/3894

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-1999-1157), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.