CVE-2009-0555: Microsoft Windows 2000

High severity, CVSS 9.3. EPSS: 27.1% chance of exploitation in the next 30 days.

Microsoft Windows Media Runtime, as used in DirectShow WMA Voice Codec, Windows Media Audio Voice Decoder, and Audio Compression Manager (ACM), does not properly process Advanced Systems Format (ASF) files, which allows remote attackers to execute arbitrary code via a crafted audio file that uses the Windows Media Speech codec, aka "Windows Media Runtime Voice Sample Rate Vulnerability."

Affected products

• Microsoft Windows 2000: any version
• Microsoft Windows Media Format Runtime: version 9.0 only; version 9.5 only; version 11 only
• Microsoft Windows Media Player: version 9 only
• Microsoft Windows Server 2003: any version; affected versions not specified
• Microsoft Windows Server 2008: any version
• Microsoft Windows Vista: any version
• Microsoft Windows XP: any version

Published 2009-10-14. Last modified 2026-06-16.