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CVE-2020-16850

7.5 · HIGH

Mitsubishi MELSEC iQ-R Series PLCs with firmware 49 allow an unauthenticated attacker to halt the industrial process by sending a crafted packet over the network.

Published Nov 30, 2020CWE-20EPSS 2.14%

Overview

CVE-2020-16850 is a high-severity vulnerability. It was published on November 30, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Mitsubishi MELSEC iQ-R Series PLCs with firmware 49 allow an unauthenticated attacker to halt the industrial process by sending a crafted packet over the network. This denial of service attack exposes Improper Input Validation. After halting, physical access to the PLC is required in order to restore production, and the device state is lost. This is related to R04CPU, RJ71GF11-T2, R04CPU, and RJ71GF11-T2.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refblog.scadafence.com/vulnerability-in-mitsubishi-electric-melsec-iq-r-seriesCISAus-cert.cisa.gov/ics/advisories/icsa-20-282-02Refblog.scadafence.com/vulnerability-in-mitsubishi-electric-melsec-iq-r-seriesCISAus-cert.cisa.gov/ics/advisories/icsa-20-282-02

How CyberStrike helps

Frequently asked questions

What is CVE-2020-16850?

CVE-2020-16850 is a high-severity vulnerability. It was published on November 30, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2020-16850?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-16850?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-16850?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-16850 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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