CVE-2009-3866: n/a vulnerability

CVE-2009-3866: The Java Web Start Installer in Sun Java SE in JDK and JRE 6 before Update 17 does not properly use securit...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 06:45 UTC (UTC+00:00)

Security readout for executives and security teams

This CVE affects old Sun Java SE 6 Java Web Start installations before Update 17. A maliciously modified JNLP file could cause the installer to trust the wrong application and run arbitrary code. Business risk is concentrated in legacy environments that still allow Java Web Start or JNLP workflows. Exposure is likely limited to legacy endpoints or applications still running Sun Java SE JDK/JRE 6 before Update 17 and using Java Web Start/JNLP. Modern Java deployments are not identified as affected in the provided sources. Treat this as high priority for legacy Java estates, especially regulated or workstation-heavy environments. It is not a broad modern-platform emergency based on the supplied evidence, but affected systems can permit remote code execution and should be upgraded, retired, or isolated. Mitigation focus: Upgrade JDK/JRE 6 to Update 17 or later where supported.; Apply relevant vendor updates from Apple, Red Hat, Gentoo, SUSE, or HP.; Remove or disable Java Web Start where JNLP workflows are not 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.

Potential ATT&CK relevance

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CVE-2009-3866 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 5, 2009, 16:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5
oval:org.mitre.oval:def:6635CVE reference · vdb-entry, signature

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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