{"cve":"CVE-2009-4030","nvd":{"published":"2009-11-30T17:30:00.360","modified":"2026-06-16T23:12:52.227","status":"Modified","description":"MySQL 5.1.x before 5.1.41 allows local users to bypass certain privilege checks by calling CREATE TABLE on a MyISAM table with modified (1) DATA DIRECTORY or (2) INDEX DIRECTORY arguments that are originally associated with pathnames without symlinks, and that can point to tables created at a future time at which a pathname is modified to contain a symlink to a subdirectory of the MySQL data home directory, related to incorrect calculation of the mysql_unpacked_real_data_home value.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2008-4098 and CVE-2008-2079.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-59"],"references":["http://bugs.mysql.com/bug.php?id=32167","http://dev.mysql.com/doc/refman/5.1/en/news-5-1-41.html","http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html","http://lists.mysql.com/commits/89940","http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html"],"products":["mysql:mysql","oracle:mysql"],"source":"nvd","synced_at":"2026-10-19T19:54:26.868835795+00:00"},"epss":{"cve":"CVE-2009-4030","score":0.00429,"percentile":0.37199,"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."]}