{"id":"CVE-2021-20598","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-20598","generatedAt":"2026-10-27T20:22:35.209Z","title":"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…","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.","published":"2021-08-06T17:15:07.000Z","lastModified":"2026-06-17T03:34:06.000Z","status":"Modified","sourceIdentifier":"Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"cwe":["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"],"epss":{"score":0.01513,"percentile":0.74306,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.51%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://jvn.jp/vu/JVNVU98578731/index.html","tags":["Third Party Advisory"],"source":"Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"},{"url":"https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-010_en.pdf","tags":["Vendor Advisory"],"source":"Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"},{"url":"https://jvn.jp/vu/JVNVU98578731/index.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-010_en.pdf","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-20598","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}