{"cve":"CVE-2009-1127","nvd":{"published":"2009-11-11T19:30:00.233","modified":"2026-06-16T23:06:33.987","status":"Modified","description":"win32k.sys in the kernel in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 does not correctly validate an argument to an unspecified system call, which allows local users to gain privileges via a crafted application that triggers a NULL pointer dereference, aka \"Win32k NULL Pointer Dereferencing Vulnerability.\"","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://www.us-cert.gov/cas/techalerts/TA09-314A.html","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-065","https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5588","http://www.us-cert.gov/cas/techalerts/TA09-314A.html","https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-065"],"products":["microsoft:windows_2000","microsoft:windows_2003_server","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-2009-1127","score":0.01546,"percentile":0.75002,"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."]}