{"cve":"CVE-2009-0091","nvd":{"published":"2009-10-14T10:30:00.483","modified":"2026-06-16T23:04:14.790","status":"Modified","description":"Microsoft .NET Framework 2.0, 2.0 SP1, and 3.5 does not properly enforce a certain type-equality constraint in .NET verifiable code, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka \"Microsoft .NET Framework Type Verification Vulnerability.\"","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-94"],"references":["http://www.us-cert.gov/cas/techalerts/TA09-286A.html","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-061","https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6451","http://www.us-cert.gov/cas/techalerts/TA09-286A.html","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-061"],"products":["microsoft:.net_framework","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-2009-0091","score":0.25811,"percentile":0.97975,"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."]}