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 legitimate user by…
Does this matter?
Lower severity and a low EPSS score (1.51%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 1.51% probability · 74th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- mitsubishielectric/r08sfcpu firmware · mitsubishielectric/r16sfcpu firmware · mitsubishielectric/r32sfcpu firmware · mitsubishielectric/r120sfcpu firmware · mitsubishielectric/r08psfcpu firmware · mitsubishielectric/r16psfcpu firmware · mitsubishielectric/r32psfcpu firmware · mitsubishielectric/r120psfcpu firmware
- Source
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp
EPSS 1.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://jvn.jp/vu/JVNVU98578731/index.htmlThird Party Advisory
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-010_en.pdfVendor Advisory
- https://jvn.jp/vu/JVNVU98578731/index.htmlThird Party Advisory
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-010_en.pdfVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.