{"api_version":"1","generated_at":"2026-04-23T07:57:12+00:00","cve":"CVE-2021-20610","urls":{"html":"https://cve.report/CVE-2021-20610","api":"https://cve.report/api/cve/CVE-2021-20610.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-20610","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-20610"},"summary":{"title":"CVE-2021-20610","description":"Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU Firmware versions \"24\" and prior, Mitsubishi Electric MELSEC iQ-R Series R04/08/16/32/120(EN)CPU Firmware versions \"57\" and prior, Mitsubishi Electric MELSEC iQ-R Series R08/16/32/120SFCPU Firmware versions \"28\" and prior, Mitsubishi Electric MELSEC iQ-R Series R08/16/32/120PCPU Firmware versions \"29\" and prior, Mitsubishi Electric MELSEC iQ-R Series R08/16/32/120PSFCPU Firmware versions \"08\" and prior, Mitsubishi Electric MELSEC iQ-R Series R16/32/64MTCPU Operating system software version \"23\" and prior, Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V Firmware versions \"16\" and prior, Mitsubishi Electric MELSEC Q Series Q03UDECPU The first 5 digits of serial No. \"23121\" and prior, Mitsubishi Electric MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU The first 5 digits of serial No. \"23121\" and prior, Mitsubishi Electric MELSEC Q Series Q03/04/06/13/26UDVCPU The first 5 digits of serial No. \"23071\" and prior, Mitsubishi Electric MELSEC Q Series Q04/06/13/26UDPVCPU The first 5 digits of serial No. \"23071\" and prior, Mitsubishi Electric MELSEC Q Series Q12DCCPU-V The first 5 digits of serial No. \"24031\" and prior, Mitsubishi Electric MELSEC Q Series Q24DHCCPU-V(G) The first 5 digits of serial No. \"24031\" and prior, Mitsubishi Electric MELSEC Q Series Q24/26DHCCPU-LS The first 5 digits of serial No. \"24031\" and prior, Mitsubishi Electric MELSEC Q Series MR-MQ100 Operating system software version \"F\" and prior, Mitsubishi Electric MELSEC Q Series Q172/173DCPU-S1 Operating system software version \"W\" and prior, Mitsubishi Electric MELSEC Q Series Q172/173DSCPU All versions, Mitsubishi Electric MELSEC Q Series Q170MCPU Operating system software version \"W\" and prior, Mitsubishi Electric MELSEC Q Series Q170MSCPU(-S1) All versions, Mitsubishi Electric MELSEC L Series L02/06/26CPU(-P) The first 5 digits of serial No. \"23121\" and prior, Mitsubishi Electric MELSEC L Series L26CPU-(P)BT The first 5 digits of serial No. \"23121\" and prior and Mitsubishi Electric MELIPC Series MI5122-VW Firmware versions \"05\" and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery.","state":"PUBLIC","assigner":"Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp","published_at":"2021-12-01 16:15:00","updated_at":"2023-11-09 09:15:00"},"problem_types":["NVD-CWE-Other"],"metrics":[],"references":[{"url":"https://jvn.jp/vu/JVNVU94434051/index.html","name":"https://jvn.jp/vu/JVNVU94434051/index.html","refsource":"MISC","tags":[],"title":"JVNVU#94434051: 三菱電機製MELSECおよびMELIPCシリーズのEthernetポートにおける複数の脆弱性","mime":"text/xml","httpstatus":"200","archivestatus":"404"},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-334-02","name":"https://us-cert.cisa.gov/ics/advisories/icsa-21-334-02","refsource":"MISC","tags":[],"title":"Mitsubishi Electric MELSEC and MELIPC Series | CISA","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdf","name":"https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdf","refsource":"MISC","tags":[],"title":"","mime":"application/pdf","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-20610","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20610","name":"NVD vulnerability 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Electric MELSEC and MELIPC Series Multiple Vulnerabilities (ICSA-21-334-02)"}]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2021-20610","ASSIGNER":"Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU Firmware versions \"24\" and prior, Mitsubishi Electric MELSEC iQ-R Series R04/08/16/32/120(EN)CPU Firmware versions \"57\" and prior, Mitsubishi Electric MELSEC iQ-R Series R08/16/32/120SFCPU Firmware versions \"28\" and prior, Mitsubishi Electric MELSEC iQ-R Series R08/16/32/120PCPU Firmware versions \"29\" and prior, Mitsubishi Electric MELSEC iQ-R Series R08/16/32/120PSFCPU Firmware versions \"08\" and prior, Mitsubishi Electric MELSEC iQ-R Series R16/32/64MTCPU Operating system software version \"23\" and prior, Mitsubishi Electric MELSEC iQ-R Series R12CCPU-V Firmware versions \"16\" and prior, Mitsubishi Electric MELSEC Q Series Q03UDECPU The first 5 digits of serial No. \"23121\" and prior, Mitsubishi Electric MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU The first 5 digits of serial No. \"23121\" and prior, Mitsubishi Electric MELSEC Q Series Q03/04/06/13/26UDVCPU The first 5 digits of serial No. \"23071\" and prior, Mitsubishi Electric MELSEC Q Series Q04/06/13/26UDPVCPU The first 5 digits of serial No. \"23071\" and prior, Mitsubishi Electric MELSEC Q Series Q12DCCPU-V The first 5 digits of serial No. \"24031\" and prior, Mitsubishi Electric MELSEC Q Series Q24DHCCPU-V(G) The first 5 digits of serial No. \"24031\" and prior, Mitsubishi Electric MELSEC Q Series Q24/26DHCCPU-LS The first 5 digits of serial No. \"24031\" and prior, Mitsubishi Electric MELSEC Q Series MR-MQ100 Operating system software version \"F\" and prior, Mitsubishi Electric MELSEC Q Series Q172/173DCPU-S1 Operating system software version \"W\" and prior, Mitsubishi Electric MELSEC Q Series Q172/173DSCPU All versions, Mitsubishi Electric MELSEC Q Series Q170MCPU Operating system software version \"W\" and prior, Mitsubishi Electric MELSEC Q Series Q170MSCPU(-S1) All versions, Mitsubishi Electric MELSEC L Series L02/06/26CPU(-P) The first 5 digits of serial No. \"23121\" and prior, Mitsubishi Electric MELSEC L Series L26CPU-(P)BT The first 5 digits of serial No. \"23121\" and prior and Mitsubishi Electric MELIPC Series MI5122-VW Firmware versions \"05\" and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-130 Improper Handling of Length Parameter Inconsistency","cweId":"CWE-130"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Mitsubishi Electric","product":{"product_data":[{"product_name":"MELSEC iQ-R Series R00/01/02CPU","version":{"version_data":[{"version_value":"Firmware versions \"24\" and prior","version_affected":"="}]}},{"product_name":"MELSEC iQ-R Series R04/08/16/32/120(EN)CPU","version":{"version_data":[{"version_value":"Firmware versions \"57\" and prior","version_affected":"="}]}},{"product_name":"MELSEC iQ-R Series R08/16/32/120SFCPU","version":{"version_data":[{"version_value":"Firmware versions \"28\" and prior","version_affected":"="}]}},{"product_name":"MELSEC iQ-R Series R08/16/32/120PCPU","version":{"version_data":[{"version_value":"Firmware versions \"29\" and prior","version_affected":"="}]}},{"product_name":"MELSEC iQ-R Series 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Handling of Length Parameter Inconsistency vulnerability in MELSEC iQ-R Series R00/01/02CPU Firmware versions \"24\" and prior, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU Firmware versions \"57\" and prior, MELSEC iQ-R Series R08/16/32/120SFCPU All versions, MELSEC iQ-R Series R08/16/32/120PCPU Firmware versions \"29\" and prior, MELSEC iQ-R Series R08/16/32/120PSFCPU All versions, MELSEC iQ-R Series R16/32/64MTCPU All versions, MELSEC iQ-R Series R12CCPU-V All versions, MELSEC Q Series Q03UDECPU The first 5 digits of serial No. \"23121\" and prior, MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU The first 5 digits of serial No. \"23121\" and prior, MELSEC Q Series Q03/04/06/13/26UDVCPU The first 5 digits of serial No. \"23071\" and prior, MELSEC Q Series Q04/06/13/26UDPVCPU The first 5 digits of serial No. \"23071\" and prior, MELSEC Q Series Q12DCCPU-V All versions, MELSEC Q Series Q24DHCCPU-V(G) All versions, MELSEC Q Series Q24/26DHCCPU-LS All versions, MELSEC Q Series MR-MQ100 All versions, MELSEC Q Series Q172/173DCPU-S1 All versions, MELSEC Q Series Q172/173DSCPU All versions, MELSEC Q Series Q170MCPU All versions, MELSEC Q Series Q170MSCPU(-S1) All versions, MELSEC L Series L02/06/26CPU(-P) The first 5 digits of serial No. \"23121\" and prior, MELSEC L Series L26CPU-(P)BT The first 5 digits of serial No. \"23121\" and prior and MELIPC Series MI5122-VW All versions allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"20610","Ordinal":"2","NoteData":"2021-12-01","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"20610","Ordinal":"3","NoteData":"2022-01-28","Type":"Other","Title":"Modified"}]}}}