CVE-2021-20594

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU firmware versions "26" and prior and Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU firmware versions "11" and prior allows a remote unauthenticated attacker to acquire legitimate user names registered in the module via brute-force attack on user names.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.86% Top 20%
Vendor Advisory mitsubishielectric.com
Affected: n/a Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU
Published at:
Updated at:

References

Link Tags
https://jvn.jp/vu/JVNVU98578731/index.html third party advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-008_en.pdf vendor advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-21-250-01

Frequently Asked Questions

What is the severity of CVE-2021-20594?
CVE-2021-20594 has been scored as a high severity vulnerability.
How to fix CVE-2021-20594?
To fix CVE-2021-20594, 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-2021-20594 being actively exploited in the wild?
It is possible that CVE-2021-20594 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-20594?
CVE-2021-20594 affects n/a Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU.
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