{"cve":"CVE-2009-2509","nvd":{"published":"2009-12-09T18:30:00.377","modified":"2026-06-16T23:09:36.483","status":"Modified","description":"Active Directory Federation Services (ADFS) in Microsoft Windows Server 2003 SP2 and Server 2008 Gold and SP2 does not properly validate headers in HTTP requests, which allows remote authenticated users to execute arbitrary code via a crafted request to an IIS web server, aka \"Remote Code Execution in ADFS Vulnerability.\"","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://www.us-cert.gov/cas/techalerts/TA09-342A.html","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-070","https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6441","http://www.us-cert.gov/cas/techalerts/TA09-342A.html","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-070"],"products":["microsoft:windows_server_2003","microsoft:windows_server_2008"],"source":"nvd","synced_at":"2026-10-19T19:54:26.868835795+00:00"},"epss":{"cve":"CVE-2009-2509","score":0.17053,"percentile":0.97078,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}