Auth bypass in Mitsubishielectric R08psfcpu

CVE-2021-20598

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 legi…

Vulnerability class: Broken Authentication

EPSS: 0.015 (71.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-20598?
CVE-2021-20598 is a medium-severity vulnerability in Mitsubishielectric R08psfcpu, classified under Improper Authentication. CVSS score: 5.3/10. Published 2021-08-06.
How severe is CVE-2021-20598?
Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2021-20598 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.