CVE-2021-20599

Description

Cleartext Transmission of Sensitive InformationCleartext transmission of sensitive information vulnerability in MELSEC iQ-R series Safety CPU R08/16/32/120SFCPU firmware versions "26" and prior and MELSEC iQ-R series SIL2 Process CPU R08/16/32/120PSFCPU firmware versions "11" and prior allows a remote unauthenticated attacker to login to a target CPU module by obtaining credentials other than password.

Categories

9.1
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.46%
Vendor Advisory mitsubishielectric.com
Affected: Mitsubishi Electric Corporation MELSEC iQ-R Series Safety CPU R08SFCPU
Affected: Mitsubishi Electric Corporation MELSEC iQ-R series Safety CPU R16SFCPU
Affected: Mitsubishi Electric Corporation MELSEC iQ-R series Safety CPU R32SFCPU
Affected: Mitsubishi Electric Corporation MELSEC iQ-R series Safety CPU R120SFCPU
Affected: Mitsubishi Electric Corporation MELSEC iQ-R Series SIL2 Process CPU R08PSFCPU
Affected: Mitsubishi Electric Corporation MELSEC iQ-R series SIL2 Process CPU R16PSFCPU
Affected: Mitsubishi Electric Corporation MELSEC iQ-R series SIL2 Process CPU R32PSFCPU
Affected: Mitsubishi Electric Corporation MELSEC iQ-R series SIL2 Process CPU R120PSFCPU
Published at:
Updated at:

References

Link Tags
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-011_en.pdf vendor advisory
https://jvn.jp/vu/JVNVU98578731 third party advisory government resource
https://www.cisa.gov/uscert/ics/advisories/icsa-21-287-03 government resource

Frequently Asked Questions

What is the severity of CVE-2021-20599?
CVE-2021-20599 has been scored as a critical severity vulnerability.
How to fix CVE-2021-20599?
To fix CVE-2021-20599, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-20599 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-20599 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-20599?
CVE-2021-20599 affects Mitsubishi Electric Corporation MELSEC iQ-R Series Safety CPU R08SFCPU, Mitsubishi Electric Corporation MELSEC iQ-R series Safety CPU R16SFCPU, Mitsubishi Electric Corporation MELSEC iQ-R series Safety CPU R32SFCPU, Mitsubishi Electric Corporation MELSEC iQ-R series Safety CPU R120SFCPU, Mitsubishi Electric Corporation MELSEC iQ-R Series SIL2 Process CPU R08PSFCPU, Mitsubishi Electric Corporation MELSEC iQ-R series SIL2 Process CPU R16PSFCPU, Mitsubishi Electric Corporation MELSEC iQ-R series SIL2 Process CPU R32PSFCPU, Mitsubishi Electric Corporation MELSEC iQ-R series SIL2 Process CPU R120PSFCPU.
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