CVE-2021-20598

Published: Aug 6, 2021Modified: Jun 17, 2026

5.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploitability: 3.9 / Impact: 1.4

Source: NVD

Description

Overly Restrictive Account Lockout Mechanism vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R08/16/32/120SFCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote unauthenticated attacker to lockout a legitimate user by continuously trying login with incorrect password.

Affected (8)

Products: Mitsubishielectric: R08sfcpu Firmware, R16sfcpu Firmware, R32sfcpu Firmware, R120sfcpu Firmware, R08psfcpu Firmware, R16psfcpu Firmware, R32psfcpu Firmware, R120psfcpu Firmware

8 products

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mitsubishielectric R08sfcpu Firmware	All versions

Running on/with	Platform Versions
Mitsubishielectric R08sfcpu	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mitsubishielectric R16sfcpu Firmware	All versions

Running on/with	Platform Versions
Mitsubishielectric R16sfcpu	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mitsubishielectric R32sfcpu Firmware	All versions

Running on/with	Platform Versions
Mitsubishielectric R32sfcpu	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mitsubishielectric R120sfcpu Firmware	All versions

Running on/with	Platform Versions
Mitsubishielectric R120sfcpu	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mitsubishielectric R08psfcpu Firmware	All versions

Running on/with	Platform Versions
Mitsubishielectric R08psfcpu	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mitsubishielectric R16psfcpu Firmware	All versions

Running on/with	Platform Versions
Mitsubishielectric R16psfcpu	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mitsubishielectric R32psfcpu Firmware	All versions

Running on/with	Platform Versions
Mitsubishielectric R32psfcpu	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mitsubishielectric R120psfcpu Firmware	All versions

Running on/with	Platform Versions
Mitsubishielectric R120psfcpu	All versions

Related CWEs

CWE-287

Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

References (4)

https://jvn.jp/vu/JVNVU98578731/index.html

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

Third Party Advisory

https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-010_en.pdf

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

Vendor Advisory

https://jvn.jp/vu/JVNVU98578731/index.html

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-010_en.pdf

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.