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Buffer overflow in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 6.0 allows remote authenticated users to execute arbitrary code via a crafted NLST (NAME LIST) command that uses wildcards, leading to memory corruption, aka "IIS FTP Service RCE and DoS Vulnerability."
Use CWE-120, Microsoft vendor hub and Internet Information Server product page to widen CVE-2009-3023 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2008-0075, CVE-2010-1256 and CVE-2007-0087 for nearby disclosures in the same product family. Additional editorial context is available in Weekly Security Roundup: Navigating the April 2026 Threat Landscape and Critical Framework Exploits.