CVE-2009-4246: Realnetworks Helix Player

High severity, CVSS 9.3. EPSS: 7.3% chance of exploitation in the next 30 days.

Stack-based buffer overflow in RealNetworks RealPlayer 10, RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741, RealPlayer 11 11.0.0 through 11.0.4, RealPlayer Enterprise, Mac RealPlayer 10 and 10.1, Linux RealPlayer 10, and Helix Player 10.x allows user-assisted remote attackers to execute arbitrary code via a malformed .RJS skin file that contains a web.xmb file with crafted length values.

Affected products

• Realnetworks Helix Player: version 10.0 only; version 11.0.0 only; version 11.0.1 only
• Realnetworks Realplayer: version 10.0 only; version 10.5 only; version 11.0 only; version 11.0.1 only; version 11.0.2 only; version 11.0.3 only; …
• Realnetworks Realplayer Enterprise: any version
• Realnetworks Realplayer SP: version 1.0.0 only; version 1.0.1 only

Published 2010-01-25. Last modified 2026-06-16.