CVE-2016-8368

Name: CVE-2016-8368
Creator: NVD / NIST
Published: 2017-02-13T21:59:01.173+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 2.61%

Last modified Jun 17, 2026

CVE-2016-8368 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. An issue was discovered in Mitsubishi Electric Automation MELSEC-Q series Ethernet interface modules QJ71E71-100, all versions, QJ71E71-B5, all versions, and QJ71E71-B2, all versions. The affected Ethernet interface module is connected to a MELSEC-Q PLC, which may allow a remote attacker to connect to the PLC via Port 5002/TCP and cause a denial of service, requiring the PLC to be reset to resume operation. EPSS estimates a 2.61% chance of exploitation in the next 30 days.

Description

An issue was discovered in Mitsubishi Electric Automation MELSEC-Q series Ethernet interface modules QJ71E71-100, all versions, QJ71E71-B5, all versions, and QJ71E71-B2, all versions. The affected Ethernet interface module is connected to a MELSEC-Q PLC, which may allow a remote attacker to connect to the PLC via Port 5002/TCP and cause a denial of service, requiring the PLC to be reset to resume operation. This is caused by an Unrestricted Externally Accessible Lock.

Metrics

CVSS 3.1

8.6/10

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

EPSS Probability

2.61%

83.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-662

Affected Software

Vendor	Product	Versions
Mitsubishielectric	Qj71e71-100 Firmware	All versions
Mitsubishielectric	Qj71e71-B5 Firmware	All versions
Mitsubishielectric	Qj71e71-B2 Firmware	All versions

References

http://www.securityfocus.com/bid/94632Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-16-336-03Mitigation, Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/94632Third Party Advisory, VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-16-336-03Mitigation, Third Party Advisory, US Government Resource

Timeline

Published: Feb 13, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-8368?

How severe is CVE-2016-8368?

CVE-2016-8368 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 2.61% probability of exploitation in the next 30 days.

How do I fix CVE-2016-8368?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-8368?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST