CVE-2020-5646

Name: CVE-2020-5646
Creator: NVD / NIST
Published: 2020-11-06T03:15:17.48+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 4.12%

Last modified Jun 17, 2026

CVE-2020-5646 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. NULL pointer dereferences vulnerability in TCP/IP function included in the firmware of GT14 Model of GOT 1000 series (GT1455-QTBDE CoreOS version "05.65.00.BD" and earlier, GT1450-QMBDE CoreOS version "05.65.00.BD" and earlier, GT1450-QLBDE CoreOS version "05.65.00.BD" and earlier, GT1455HS-QTBDE CoreOS version "05.65.00.BD" and earlier, and GT1450HS-QMBDE CoreOS version "05.65.00.BD" and earlier) allows a remote unauthenticated attacker to stop the network functions of the products via a specially crafted packet.. EPSS estimates a 4.12% chance of exploitation in the next 30 days.

Description

NULL pointer dereferences vulnerability in TCP/IP function included in the firmware of GT14 Model of GOT 1000 series (GT1455-QTBDE CoreOS version "05.65.00.BD" and earlier, GT1450-QMBDE CoreOS version "05.65.00.BD" and earlier, GT1450-QLBDE CoreOS version "05.65.00.BD" and earlier, GT1455HS-QTBDE CoreOS version "05.65.00.BD" and earlier, and GT1450HS-QMBDE CoreOS version "05.65.00.BD" and earlier) allows a remote unauthenticated attacker to stop the network functions of the products 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:N/A:H

EPSS Probability

4.12%

89.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Mitsubishielectric	Coreos	<= 05.65.00.bd

References

https://jvn.jp/vu/JVNVU99562395/index.htmlThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-20-310-02Third Party Advisory, US Government Resource
https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-014.pdfVendor Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-014_en.pdfVendor Advisory
https://jvn.jp/vu/JVNVU99562395/index.htmlThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-20-310-02Third Party Advisory, US Government Resource
https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-014.pdfVendor Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-014_en.pdfVendor Advisory

Timeline

Published: Nov 6, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5646?

How severe is CVE-2020-5646?

CVE-2020-5646 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.12% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5646?

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-2020-5646?

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

Scan your code now

Source: NVD / NIST