CVE-2009-1920: Microsoft Windows 2000

High severity, CVSS 9.3. EPSS: 21.5% chance of exploitation in the next 30 days.

The JScript scripting engine 5.1, 5.6, 5.7, and 5.8 in JScript.dll in Microsoft Windows, as used in Internet Explorer, does not properly load decoded scripts into memory before execution, which allows remote attackers to execute arbitrary code via a crafted web site that triggers memory corruption, aka "JScript Remote Code Execution Vulnerability."

Affected products

• Microsoft Windows 2000: affected versions not specified
• Microsoft Windows Server 2003: any version
• Microsoft Windows Server 2008: any version; affected versions not specified
• Microsoft Windows Vista: any version; affected versions not specified
• Microsoft Windows XP: any version; affected versions not specified

Published 2009-09-08. Last modified 2026-06-16.