CVE-2004-1029: The Sun Java Plugin capability in Java 2 Runtime Environment (JRE) 1.4.2_01, 1.4.2_04, and possibly earlier...

Security readout for executives and security teams

This is a legacy Java browser plugin flaw that could let a malicious web page break out of expected Java applet restrictions and run code through the user’s browser context. Business risk is mainly for old desktops, kiosks, VDI images, or embedded workflows that still carry Java 1.4-era browser plugin components. Exposure is most likely in legacy browser environments with the Sun Java Plugin enabled, especially systems retained for old applet-based applications. Modern managed endpoints are less likely exposed unless obsolete JRE browser plugin components remain installed or accessible. Treat as a high-priority legacy exposure item, not a broad modern internet emergency. Prioritize environments where old Java browser plugins remain because arbitrary code execution through user browsing can create endpoint compromise risk. Mitigation focus: Inventory endpoints for Sun JRE 1.4.2_01, 1.4.2_04, and earlier plugin components.; Disable or remove Java browser plugins where business applications do not require them.; Apply relevant vendor updates from Sun, Apple, IBM, or distribution advisories..

Prepared

Jun 30, 2026, 02:08 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.