CVE-2009-3866: Sun JDK
High severity, CVSS 9.3. EPSS: 6.2% chance of exploitation in the next 30 days.
The Java Web Start Installer in Sun Java SE in JDK and JRE 6 before Update 17 does not properly use security model permissions when removing installer extensions, which allows remote attackers to execute arbitrary code by modifying a certain JNLP file to have a URL field that points to an unintended trusted application, aka Bug Id 6872824.
Affected products
Published 2009-11-05. Last modified 2026-06-16.