What’s Vulnerable › Vulnerabilities

CVE-2011-1965

• Severity: high (CVSS 7.1 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 24.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2011-08-10 · updated 2026-06-16
• Weakness: CWE-399

Description

Tcpip.sys in the TCP/IP stack in Microsoft Windows 7 Gold and SP1 and Windows Server 2008 R2 and R2 SP1 does not properly implement URL-based QoS, which allows remote attackers to cause a denial of service (reboot) via a crafted URL to a web server, aka "TCP/IP QOS Denial of Service Vulnerability."

Affected products

• Microsoft Windows 7: all versions
• Microsoft Windows Server 2008: r2

References

• http://securityreason.com/securityalert/8474
• http://www.us-cert.gov/cas/techalerts/TA11-221A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-064
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12318
• http://securityreason.com/securityalert/8474
• http://www.us-cert.gov/cas/techalerts/TA11-221A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-064
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12318

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