critical
9.1
CWE
522
Advisory Published
Updated

CVE-2021-20597

First published: Fri Aug 06 2021(Updated: )

Insufficiently Protected Credentials 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 all versions allows a remote unauthenticated attacker to login to the target unauthorizedly by sniffing network traffic and obtaining credentials when registering user information in the target or changing a password.

Credit: Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp

Affected SoftwareAffected VersionHow to fix
Mitsubishielectric R08sfcpu Firmware
Mitsubishielectric R08sfcpu
Mitsubishielectric R16sfcpu Firmware
Mitsubishielectric R16sfcpu
Mitsubishielectric R32sfcpu Firmware
Mitsubishielectric R32sfcpu
Mitsubishielectric R120sfcpu Firmware
Mitsubishielectric R120sfcpu
Mitsubishielectric R08psfcpu Firmware
Mitsubishielectric R08psfcpu
Mitsubishielectric R16psfcpu Firmware
Mitsubishielectric R16psfcpu
Mitsubishielectric R32psfcpu Firmware
Mitsubishielectric R32psfcpu
Mitsubishielectric R120psfcpu Firmware
Mitsubishielectric R120psfcpu
All of
Mitsubishielectric R08sfcpu Firmware
Mitsubishielectric R08sfcpu
All of
Mitsubishielectric R16sfcpu Firmware
Mitsubishielectric R16sfcpu
All of
Mitsubishielectric R32sfcpu Firmware
Mitsubishielectric R32sfcpu
All of
Mitsubishielectric R120sfcpu Firmware
Mitsubishielectric R120sfcpu
All of
Mitsubishielectric R08psfcpu Firmware
Mitsubishielectric R08psfcpu
All of
Mitsubishielectric R16psfcpu Firmware
Mitsubishielectric R16psfcpu
All of
Mitsubishielectric R32psfcpu Firmware
Mitsubishielectric R32psfcpu
All of
Mitsubishielectric R120psfcpu Firmware
Mitsubishielectric R120psfcpu

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for the Insufficiently Protected Credentials vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules?

    The vulnerability ID is CVE-2021-20597.

  • What is the severity rating of CVE-2021-20597?

    The severity rating of CVE-2021-20597 is 9.1 (Critical).

  • Which software versions are affected by CVE-2021-20597?

    The vulnerability affects Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU firmware versions "26" and prior.

  • Is there a fix available for CVE-2021-20597?

    Yes, Mitsubishi Electric has released a firmware update to address the vulnerability.

  • Where can I find more information about CVE-2021-20597?

    You can find more information about CVE-2021-20597 in the following references: [Link 1](https://jvn.jp/vu/JVNVU98578731/index.html), [Link 2](https://www.cisa.gov/uscert/ics/advisories/icsa-21-250-01), [Link 3](https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-009_en.pdf).

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