{"id":"CVE-2021-20596","state":"PUBLISHED","title":"NULL Pointer Dereference in MELSEC-F Series FX3U-ENET firmware version 1.14 and prior, FX3U-ENET-L firmware version 1.14 and prior and FX3U-ENET-P502 firmware version 1.14 and prio","description":"NULL Pointer Dereference in MELSEC-F Series FX3U-ENET firmware version 1.14 and prior, FX3U-ENET-L firmware version 1.14 and prior and FX3U-ENET-P502 firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a DoS condition in communication by sending specially crafted packets. Control by MELSEC-F series PLC is not affected and system reset is required for recovery.","publishedAt":"2021-07-22T11:02:56.000Z","updatedAt":"2024-08-03T17:45:44.834Z","severity":null,"assigner":"Mitsubishi","products":["n/a MELSEC-F Series FX3U-ENET; FX3U-ENET-L; FX3U-ENET-P502"],"affected":[{"vendor":"n/a","product":"MELSEC-F Series FX3U-ENET; FX3U-ENET-L; FX3U-ENET-P502","versions":[{"version":"Firmware version 1.14 and prior","status":"affected"}]}],"references":["https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf","https://jvn.jp/vu/JVNVU94348759/index.html","https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01"],"weaknesses":[],"ingestedAt":"2026-10-29T19:47:55.610Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/20xxx/CVE-2021-20596.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-20596","state":"PUBLISHED","datePublished":"2021-07-22T11:02:56.000Z","dateUpdated":"2024-08-03T17:45:44.834Z","assignerShortName":"Mitsubishi","assignerOrgId":"e0f77b61-78fd-4786-b3fb-1ee347a748ad","dateReserved":"2020-12-17T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"NULL Pointer Dereference in MELSEC-F Series FX3U-ENET firmware version 1.14 and prior, FX3U-ENET-L firmware version 1.14 and prior and FX3U-ENET-P502 firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a DoS condition in communication by sending specially crafted packets. Control by MELSEC-F series PLC is not affected and system reset is required for recovery."}],"affected":[{"vendor":"n/a","product":"MELSEC-F Series FX3U-ENET; FX3U-ENET-L; FX3U-ENET-P502","versions":[{"version":"Firmware version 1.14 and prior","status":"affected"}]}],"references":[{"url":"https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf","tags":["x_refsource_MISC"]},{"url":"https://jvn.jp/vu/JVNVU94348759/index.html","tags":["x_refsource_MISC"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01","tags":["x_refsource_MISC"]}],"problemTypes":[{"descriptions":[{"description":"NULL Pointer Dereference","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"Mitsubishi","dateUpdated":"2021-07-30T20:02:26.000Z","orgId":"e0f77b61-78fd-4786-b3fb-1ee347a748ad"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp","ID":"CVE-2021-20596","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"MELSEC-F Series FX3U-ENET; FX3U-ENET-L; FX3U-ENET-P502","version":{"version_data":[{"version_value":"Firmware version 1.14 and prior"},{"version_value":"Firmware version 1.14 and prior"},{"version_value":"Firmware version 1.14 and prior"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"NULL Pointer Dereference in MELSEC-F Series FX3U-ENET firmware version 1.14 and prior, FX3U-ENET-L firmware version 1.14 and prior and FX3U-ENET-P502 firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a DoS condition in communication by sending specially crafted packets. Control by MELSEC-F series PLC is not affected and system reset is required for recovery."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"NULL Pointer Dereference"}]}]},"references":{"reference_data":[{"name":"https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf","refsource":"MISC","url":"https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf"},{"name":"https://jvn.jp/vu/JVNVU94348759/index.html","refsource":"MISC","url":"https://jvn.jp/vu/JVNVU94348759/index.html"},{"name":"https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01","refsource":"MISC","url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://jvn.jp/vu/JVNVU94348759/index.html","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T17:45:44.834Z"}}]}}}