CVE-2009-3023: Microsoft Internet Information Server

High severity, CVSS 9.0. EPSS: 90.9% chance of exploitation in the next 30 days.

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."

Affected products

• Microsoft Internet Information Server: from 5.0, up to and including 6.0

Published 2009-08-31. Last modified 2026-06-16.