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    CVE-2009-1926

    Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 allow remote attackers to cause a denial of service (TCP outage) via a series of TCP sessions that have pending data and a (1) small or (2) zero receive window size, and remain in the FIN-WAIT-1 or FIN-WAIT-2 state indefinitely, aka "TCP/IP Orphaned Connections Vulnerability."

    Published:Sep 8, 2009
    Last Modified:Apr 23, 2026
    EPS:Sep 8, 2009
    EPSS Score:0.70537
    CVSS Score:7.8

    Affected Products

    Vendor
    Microsoft
    Product
    Windows 2000
    Vendor
    Microsoft
    Product
    Windows Server 2003
    Vendor
    Microsoft
    Product
    Windows Server 2008
    Vendor
    Microsoft
    Product
    Windows Vista
    Vendor
    Microsoft
    Product
    Windows Xp

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://osvdb.org/57797
    http://www.recurity-labs.com/content/pub/Microsoft_Windows_CVE-2009-1926
    http://www.securityfocus.com/archive/1/506331/100/0/threaded
    http://www.securityfocus.com/bid/36269
    http://www.us-cert.gov/cas/techalerts/TA09-251A.html
    https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-048
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5965
    http://osvdb.org/57797
    http://www.recurity-labs.com/content/pub/Microsoft_Windows_CVE-2009-1926
    http://www.securityfocus.com/archive/1/506331/100/0/threaded
    http://www.securityfocus.com/bid/36269
    http://www.us-cert.gov/cas/techalerts/TA09-251A.html
    https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-048
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5965

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High