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Vulnerability record · CVE-1999-1291 · published 5 October 1998

CVE-1999-1291: Microsoft windows 95 vulnerability

Microsoft · Windows 95

TCP/IP implementation in Microsoft Windows 95, Windows NT 4.0, and possibly others, allows remote attackers to reset connections by forcing a reset (RST) via a PSH ACK or other means, obtaining the target's last sequence number from the resulting packet, then spoofing a reset to the target.

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
2Affected product versions listed by NVD
4References
16 Jun 2026Last modified by NVD

Description

TCP/IP implementation in Microsoft Windows 95, Windows NT 4.0, and possibly others, allows remote attackers to reset connections by forcing a reset (RST) via a PSH ACK or other means, obtaining the target's last sequence number from the resulting packet, then spoofing a reset to the target.

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

Affected products

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

References

LinkTags
http://www.securityfocus.com/archive/1/10789 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/1383
http://www.securityfocus.com/archive/1/10789 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/1383

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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-1999-1291), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.