What’s Vulnerable › Vulnerabilities

CVE-1999-1291

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 13.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2001-09-12 · updated 2026-06-16

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.

Affected products

• Microsoft Windows 95: all versions
• Microsoft Windows Nt: 4.0

References

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

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