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Vulnerability record · CVE-2016-3427 · published 21 April 2016

CVE-2016-3427: Oracle Java SE JMX Improper Access Control Vulnerability

Oracle · Jdk

CVE-2016-3427 is an unspecified vulnerability in Oracle Java SE 6u113, 7u99, 8u77, Java SE Embedded 8u77, and JRockit R28.3.9, reached through vectors related to JMX. It is rated critical (CVSS 3.1 9.8) and is listed in CISA KEV, so it matters to any environment still running these Java versions.

9.8 CVSS 3.1 Critical CISA KEV since 12 May 2023 EPSS 92% · top 0.2% CWE-284 · Improper access control
9.8CVSS 3.1 base score, v2 10.0
92%EPSS exploitation probability, 30 days
YesIn CISA KEV, fix deadline passed
38Affected product versions listed by NVD
119References
17 Jun 2026Last modified by NVD

Description

Unspecified vulnerability in Oracle Java SE 6u113, 7u99, and 8u77; Java SE Embedded 8u77; and JRockit R28.3.9 allows remote attackers to affect confidentiality, integrity, and availability via vectors related to JMX.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: medium.

critical priorityCVSS 9.8 with network, unauthenticated, no-interaction exploitation plus CISA KEV listing and a 0.92 EPSS probability make this an urgent patch.

What it is

CVE-2016-3427 is an unspecified vulnerability in Oracle Java SE 6u113, 7u99, 8u77, Java SE Embedded 8u77, and JRockit R28.3.9, reached through vectors related to JMX. It is rated critical (CVSS 3.1 9.8) and is listed in CISA KEV, so it matters to any environment still running these Java versions.

Impact

A remote attacker can affect confidentiality, integrity, and availability, meaning potential full compromise of the Java process and its data. The record does not specify the exact primitive or data exposed.

Attack surface

The CVSS vector is network-reachable with no privileges and no user interaction (AV:N/AC:L/PR:N/UI:N), and the description ties the flaw to JMX. Any exposed JMX endpoint or application using the affected Java versions is in scope.

Exploitation

CVE-2016-3427 is in CISA KEV (added 2023-05-12) and has an EPSS 30-day probability of 0.92334 (99.8th percentile), indicating observed exploitation and very high predicted activity. No ransomware campaign use is documented.

What to do

  • Apply the vendor updates for Oracle Java SE, Java SE Embedded, and JRockit per the CISA KEV required action; upgrade to a fixed Java release.
  • Apply the referenced Red Hat, SUSE/openSUSE, and other distribution errata for affected packages.
  • Restrict network access to JMX endpoints (RMI/JMXMP) to trusted hosts and disable remote JMX where it is not required.
  • Enable JMX authentication and TLS if remote JMX must remain enabled, and remove default or weak credentials.
  • Inventory and retire or isolate end-of-life Java 6, 7, and 8u77 deployments that cannot be patched.

Detection

  • Monitor network traffic to JMX/RMI ports for unexpected external connections or serialized payloads.
  • Alert on Java processes spawning unusual child processes or making outbound connections after JMX activity.
  • Check hosts and containers for Java versions 6u113, 7u99, 8u77, and JRockit R28.3.9 and flag them as unpatched.
  • Review JMX access logs and authentication failures for anomalous remote clients.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.

Exploitation in the wild

CISA added CVE-2016-3427 to the Known Exploited Vulnerabilities catalog on 12 May 2023 as "Oracle Java SE and JRockit Unspecified Vulnerability". Required action: Apply updates per vendor instructions. Federal deadline 2 June 2023.

Affected products

38 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00006.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00009.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00012.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00021.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00022.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00026.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00027.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00039.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00040.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00042.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00058.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00059.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00061.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00067.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00002.html Mailing ListThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0650.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0651.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0675.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0676.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0677.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0678.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0679.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0701.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0702.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0708.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0716.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0723.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-1039.html Third Party Advisory
http://www.debian.org/security/2016/dsa-3558 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/08/31/1 Mailing List
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html PatchVendor Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html PatchThird Party Advisory
http://www.securityfocus.com/bid/86421 Broken LinkThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1035596 Broken LinkThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037331 Broken LinkThird Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/USN-2963-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2964-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2972-1 Third Party Advisory
https://access.redhat.com/errata/RHSA-2016:1430 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1216 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2016-3427), CISA KEV, FIRST EPSS (scores of 2026-09-24). This page is refreshed as NVD updates the record.