CVE-2007-6401: 3ivx Mpeg-4 Codec

High severity, CVSS 9.3. EPSS: 29.7% chance of exploitation in the next 30 days.

Stack-based buffer overflow in mplayer2.exe in Microsoft Windows Media Player (WMP) 6.4, when used with the 3ivx 4.5.1 or 5.0.1 codec, allows remote attackers to execute arbitrary code via a certain .mp4 file, possibly a related issue to CVE-2007-6402.

Affected products

• 3ivx Mpeg-4 Codec: version 4.5.1 only; version 5.0.1 only
• Microsoft Windows Media Player: version 6.4 only

Published 2007-12-17. Last modified 2026-06-16.