CVE-2011-1965

Tcpip.sys in the TCP/IP stack in Microsoft Windows 7 Gold and SP1 and Windows Server 2008 R2 and...

7.1 HighPublic exploit

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."

Exploit likelihood

24.9%Down 11.4 points since Feb 4, 2022

What each source reports

NVD Score used 7.1

Record: CVE-2011-1965
CVSS 2.0: 7.1 HighAV:N/AC:M/Au:N/C:N/I:N/A:C
Weakness: CWE-399
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-1965
Updated: 2026-11-02

EUVDEUVD-2011-1959 No score

Record: EUVD-2011-1959
Updated: 2026-11-03

GitHub AdvisoriesGHSA-3953-5jrj-v3rr No score

Tcpip.sys in the TCP/IP stack in Microsoft Windows 7 Gold and SP1 and Windows Server 2008 R2 and...

Record: GHSA-3953-5jrj-v3rr
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Microsoft Windows - TCP/IP Stack Denial of Service (MS11-064)	2011-10-15

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-1965 is a high vulnerability (CVSS 7.1) in Microsoft Windows 7, published August 10, 2011. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 24.9%, the 97th percentile. No source names a fixed version.