{"id":"CVE-2009-1926","aliases":["EUVD-2009-1921","GHSA-69v4-mh7p-68f3"],"status":"published","title":"Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server...","description":"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.\"","severity":{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.35042,"percentile":0.98448,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2009-09-08T22:00:00Z","modified":"2026-06-16T23:08:22Z","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"}],"references":[{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5965","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"http://www.recurity-labs.com/content/pub/Microsoft_Windows_CVE-2009-1926","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.securityfocus.com/bid/36269","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://osvdb.org/57797","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"http://www.us-cert.gov/cas/techalerts/TA09-251A.html","tags":["third-party-advisory","x_refsource_CERT","x_transferred","US Government Resource"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-048","tags":["vendor-advisory","x_refsource_MS","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/506331/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-1926"},{"url":"https://github.com/advisories/GHSA-69v4-mh7p-68f3"}],"sources":{"cve":[{"id":"CVE-2009-1926","description":"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.\"","status":"published","published":"2009-09-08T22:00:00Z","modified":"2024-10-17T18:29:15.515Z","updated_at":"2026-11-02T14:33:25.126493Z"}],"euvd":[{"id":"EUVD-2009-1921","description":"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.\"","status":"published","published":"2009-09-08T22:00:00Z","modified":"2024-10-17T18:29:15Z","updated_at":"2026-11-03T00:27:33.799805Z"}],"ghsa":[{"id":"GHSA-69v4-mh7p-68f3","title":"Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server...","description":"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.\"","status":"published","published":"2022-05-02T03:29:58Z","modified":"2023-01-31T05:07:41Z","updated_at":"2026-11-02T14:49:15.572722Z"}],"nvd":[{"id":"CVE-2009-1926","description":"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.\"","status":"published","published":"2009-09-08T22:30:00.39Z","modified":"2026-06-16T23:08:22.48Z","cvss":[{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:01:36.596719Z"}]}}