CVE-2023-4625
mediumpriority · track · 21EPSS 0.009 · 61 %ileEUUSEPSS · scored 2026-10-27
Improper Restriction of Excessive Authentication Attempts vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F/iQ-R Series CPU modules Web server function allows a remote unauthenticated attacker to prevent legitimate users from logging into the Web server function for a certain period after the attacker has attempted to log in illegally by continuously attempting unauthorized login to the Web server function. The impact of this vulnerability will persist while the attacker continues to attempt unauthorized login.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No vendor fix yet; a mitigation is available.
- MitigationFX5S-xMy/z x=30,40,60,80*, y=T,R, z=ES,ESScisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
- MitigationFX5U-xMy/z x=32,64,80, y=T,R, z=ES,DS,ESS,DSS (Serial number 179**** and prior)cisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
- MitigationFX5U-xMy/z x=32,64,80, y=T,R, z=ES,DS,ESS,DSS (Serial number 17X**** and later)cisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
- MitigationFX5UC-32MT/DS-TS, FX5UC-32MT/DSS-TS, FX5UC-32MR/DS-TScisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
- MitigationFX5UC-xMy/z x=32,64,96, y=T, z=D,DSS (Serial number 179**** and prior)cisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
- MitigationFX5UC-xMy/z x=32,64,96, y=T, z=D,DSS (Serial number 17X**** and later)cisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
- MitigationFX5UJ-xMy/ES-A* x=24,40,60, y=T,Rcisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
- MitigationFX5UJ-xMy/z x=24,40,60, y=T,R, z=ES,DS,ESS,DSScisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
- MitigationR00/01/02CPUcisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
- MitigationR04/08/16/32/120(EN)CPUcisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
- MitigationR08/16/32/120/PCPUcisa_csaf_ot
Mitsubishi Electric recommends that users take the following mitigation measures to minimize the risk:
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (189)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-23-306-02Mitsubishi Electric MELSEC iQ-F/iQ-R Series CPU Module (Update A)2023-11-02icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could allow a remote attacker to prevent legitimate users from logging into the web server function for a certain period, resulting in a denial-of-service condition. The impact of this vulnerability will persist while the attacker continues to attempt the attack.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://cxsecurity.com/cveshow/CVE-2023-4625/cnnvd
- https://jvn.jp/vu/JVNVU94620134cnnvd
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-306-02cnnvd
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-014_en.pdfcnnvd
- https://jvn.jp/vu/JVNVU94620134enisa_euvd
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-306-02enisa_euvd
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-014_en.pdfenisa_euvd
- https://jvn.jp/vu/JVNVU94620134Third Party Advisorynvd
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