Multiple vulnerabilities in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 6 and earlier allow remote attackers to execute arbitrary code via a crafted applet that bypasses SecurityManager restrictions by (1) using com.sun.beans.finder.ClassFinder.findClass and leveraging an exception with the forName method to access restricted classes from arbitrary packages such as sun.awt.SunToolkit, then (2) using "reflection with a trusted immediate caller" to leverage the getField method to access and modify private fields, as exploited in the wild in August 2012 using Gondzz.class and Gondvv.class.
Use CWE-284, Oracle vendor hub and Jdk product page to widen CVE-2012-4681 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2025-50106, CVE-2026-21945 and CVE-2025-53066 for nearby disclosures in the same product family.