{"id":"CVE-2009-2526","aliases":["EUVD-2009-2521","GHSA-6cf2-g5cm-mr2w"],"status":"published","title":"Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 do not properly validate...","description":"Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 do not properly validate fields in SMBv2 packets, which allows remote attackers to cause a denial of service (infinite loop and system hang) via a crafted packet to the Server service, aka \"SMBv2 Infinite Loop 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":0.81891,"percentile":0.99653,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-399"],"published":"2009-10-14T10:00:00Z","modified":"2026-06-16T23:09:38Z","exploits":[{"source":"exploitdb","id":"EDB-14674","title":"Microsoft Windows - 'srv2.sys' SMB Negotiate ProcessID Function Table Dereference (MS09-050)","type":"remote","platform":"windows","date":"2010-08-17","url":"https://www.exploit-db.com/exploits/14674"},{"source":"exploitdb","id":"EDB-40280","title":"Microsoft Windows - 'srv2.sys' SMB Code Execution (Python) (MS09-050)","type":"remote","platform":"windows","date":"2016-02-26","url":"https://www.exploit-db.com/exploits/40280"}],"products":[{"vendor":"microsoft","product":"windows_server_2008"},{"vendor":"microsoft","product":"windows_vista"}],"references":[{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-050","tags":["vendor-advisory","x_refsource_MS","x_transferred"]},{"url":"http://www.us-cert.gov/cas/techalerts/TA09-286A.html","tags":["third-party-advisory","x_refsource_CERT","x_transferred","US Government Resource"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5595","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-2526"},{"url":"https://github.com/advisories/GHSA-6cf2-g5cm-mr2w"}],"sources":{"cve":[{"id":"CVE-2009-2526","description":"Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 do not properly validate fields in SMBv2 packets, which allows remote attackers to cause a denial of service (infinite loop and system hang) via a crafted packet to the Server service, aka \"SMBv2 Infinite Loop Vulnerability.\"","status":"published","published":"2009-10-14T10:00:00Z","modified":"2024-08-07T05:52:14.833Z","updated_at":"2026-11-02T14:33:23.041383Z"}],"euvd":[{"id":"EUVD-2009-2521","description":"Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 do not properly validate fields in SMBv2 packets, which allows remote attackers to cause a denial of service (infinite loop and system hang) via a crafted packet to the Server service, aka \"SMBv2 Infinite Loop Vulnerability.\"","status":"published","published":"2009-10-14T10:00:00Z","modified":"2024-08-07T05:52:14Z","updated_at":"2026-11-03T01:39:17.005545Z"}],"ghsa":[{"id":"GHSA-6cf2-g5cm-mr2w","title":"Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 do not properly validate...","description":"Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 do not properly validate fields in SMBv2 packets, which allows remote attackers to cause a denial of service (infinite loop and system hang) via a crafted packet to the Server service, aka \"SMBv2 Infinite Loop Vulnerability.\"","status":"published","published":"2022-05-02T03:36:06Z","modified":"2023-01-31T05:07:33Z","updated_at":"2026-11-02T14:49:14.096889Z"}],"nvd":[{"id":"CVE-2009-2526","description":"Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 do not properly validate fields in SMBv2 packets, which allows remote attackers to cause a denial of service (infinite loop and system hang) via a crafted packet to the Server service, aka \"SMBv2 Infinite Loop Vulnerability.\"","status":"published","published":"2009-10-14T10:30:01.67Z","modified":"2026-06-16T23:09:38.247Z","cvss":[{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-399"],"updated_at":"2026-11-02T14:01:37.004244Z"}]}}