CVE-2020-5596

Name: CVE-2020-5596
Creator: NVD / NIST
Published: 2020-07-07T09:15:10.153+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.64%

Last modified Jun 17, 2026

CVE-2020-5596 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. TCP/IP function included in the firmware of Mitsubishi Electric GOT2000 series (CoreOS with version -Y and earlier installed in GT27 Model, GT25 Model, and GT23 Model) does not properly manage sessions, which may allow a remote attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.. EPSS estimates a 1.64% chance of exploitation in the next 30 days.

Description

TCP/IP function included in the firmware of Mitsubishi Electric GOT2000 series (CoreOS with version -Y and earlier installed in GT27 Model, GT25 Model, and GT23 Model) does not properly manage sessions, which may allow a remote attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.64%

73.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-384

Affected Software

Vendor	Product	Versions
Mitsubishielectric	Coreos	<= y

References

https://jvn.jp/en/vu/JVNVU95413676/index.htmlThird Party Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-005_en.pdfVendor Advisory
https://jvn.jp/en/vu/JVNVU95413676/index.htmlThird Party Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-005_en.pdfVendor Advisory

Timeline

Published: Jul 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5596?

How severe is CVE-2020-5596?

CVE-2020-5596 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.64% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5596?

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-2020-5596?

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

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Source: NVD / NIST