{"cve":"CVE-2009-2511","nvd":{"published":"2009-10-14T10:30:01.517","modified":"2026-06-16T23:09:36.713","status":"Modified","description":"Integer overflow in the CryptoAPI component in Microsoft Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allows man-in-the-middle attackers to spoof arbitrary SSL servers and other entities via an X.509 certificate that has a malformed ASN.1 Object Identifier (OID) and was issued by a legitimate Certification Authority, aka \"Integer Overflow in X.509 Object Identifiers Vulnerability.\"","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-189"],"references":["http://www.us-cert.gov/cas/techalerts/TA09-286A.html","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-056","https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6186","http://www.us-cert.gov/cas/techalerts/TA09-286A.html","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-056"],"products":["microsoft:windows_2000","microsoft:windows_7","microsoft:windows_server_2003","microsoft:windows_server_2008","microsoft:windows_vista","microsoft:windows_xp"],"source":"nvd","synced_at":"2026-10-19T19:54:26.868835795+00:00"},"epss":{"cve":"CVE-2009-2511","score":0.12959,"percentile":0.96323,"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."]}