Published: 06/08/2021 Updated: 27/08/2021

CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10

CVSS v3 Base Score: 5.3 | Impact Score: 1.4 | Exploitability Score: 3.9

VMScore: 445

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

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 malicious user to lockout a legitimate user by continuously trying login with incorrect password.

Vulnerable Product	Search on Vulmon	Subscribe to Product
mitsubishielectric r08sfcpu_firmware
mitsubishielectric r16sfcpu_firmware
mitsubishielectric r32sfcpu_firmware
mitsubishielectric r120sfcpu_firmware
mitsubishielectric r08psfcpu_firmware
mitsubishielectric r16psfcpu_firmware
mitsubishielectric r32psfcpu_firmware
mitsubishielectric r120psfcpu_firmware

Critical Infrastructure Sectors: Critical Manufacturing

CWE-287 https://jvn.jp/vu/JVNVU98578731/index.html https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-010_en.pdf https://nvd.nist.gov https://www.cisa.gov/uscert/ics/advisories/icsa-21-250-01

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CVE-2021-20598

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