CVE-2009-3873: The JPEG Image Writer in Sun Java SE in JDK and JRE 5.0 before Update 22, JDK and JRE 6 before Update 17, a...

Security readout for executives and security teams

CVE-2009-3873 is an old Sun Java SE flaw in the JPEG image writer. A maliciously crafted image could trigger a quantization-related issue and allow privilege gain. The practical concern is legacy Java runtimes still present on servers, desktops, or embedded workloads that process JPEG files. Exposure is most likely where obsolete Java 1.4, 5, or early 6 runtimes remain installed, especially applications that accept, transform, or generate JPEG images using Java image APIs. Prioritize remediation if legacy Java is still present in business systems or image-processing workflows. For fully modernized environments, urgency is lower but inventory confirmation is still warranted. Mitigation focus: Upgrade affected Java runtimes to the fixed update levels or later.; Apply platform vendor Java security updates where Java is OS-packaged.; Remove obsolete Java 1.4, 5, and early 6 runtimes where no longer required..

Prepared

Jun 28, 2026, 18:15 UTC (UTC+00:00)

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