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Rewterz Threat Advisory – CVE-2020-5666 – ICS:Mitsubishi Electric MELSEC iQ-R Series Denial of Service Vulnerability

Severity

Medium

Analysis Summary

A denial-of-service vulnerability due to uncontrolled resource consumption exists in MELSEC iQ-R series CPU modules. This vulnerability does not affect products when the “To Use or Not to Use Web Server” parameter of CPU modules is set to “Not Use.” The default setting is “Not Use.”

Impact

Denial of service

Affected Vendors

Mitsubishi Electric

Affected Products

  • R00/01/02 CPU Firmware versions from 05 to 19
  • R04/08/16/32/120(EN) CPU Firmware versions from 35 to 51

Remediation

Refer to vendor advisory for the complete list of affected products and their respective patches.

https://us-cert.cisa.gov/ics/advisories/icsa-20-317-01