CVE-2004-1166: Microsoft Ie

High severity, CVSS 7.5. EPSS: 39.2% chance of exploitation in the next 30 days.

CRLF injection vulnerability in Microsoft Internet Explorer 6.0.2800.1106 and earlier allows remote attackers to execute arbitrary FTP commands via an ftp:// URL that contains a URL-encoded newline ("%0a") before the FTP command, which causes the commands to be inserted into the resulting FTP session, as demonstrated using a PORT command.

Affected products

• Microsoft Ie: version 6.0 only
• Microsoft Internet Explorer: version 6.0 only

Published 2004-12-31. Last modified 2026-06-16.