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Varaxon Technologies

Known exploited vulnerability · CISA KEV

CVE-2016-3427: Oracle Java SE and JRockit Unspecified Vulnerability

Oracle Java SE and JRockit contains an unspecified vulnerability that allows remote attackers to affect confidentiality, integrity, and availability via vectors related to Java Management Extensions (JMX). This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service.

CVE-2016-3427

Exploited in the wild. Fix this first.

CISA added it to the Known Exploited Vulnerabilities catalog on 2023-05-12: attackers are using it right now.

CISA KEV
Listed
Added 2023-05-12 · federal fix-by 2023-06-02
EPSS (30 days)
92%
Higher than 99.8% of CVEs · 2026-11-01
CVSS
No score

What CISA says

Oracle Java SE and JRockit Unspecified Vulnerability

Apply updates per vendor instructions.

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How to check if you are exposed to CVE-2016-3427

  1. Find every Oracle Java SE and JRockit system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
  2. Compare each version with the fixed versions in the vendor advisory below. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
  3. Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2016-3427.

US federal agencies had to fix this by 2023-06-02. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Timeline

  1. · Added to CISA's Known Exploited Vulnerabilities catalog
  2. · Fix-by date for US federal agencies, passed 1,248 days ago

Vendor advisories and fixes

More exploited Oracle vulnerabilities

CISA lists 46 exploited Oracle vulnerabilities. The closest matches:

Keep going

Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.

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