{"id":"CVE-2021-20600","aliases":["EUVD-2021-8018","GHSA-8r87-v86x-7qm3"],"status":"published","title":"Uncontrolled resource consumption in MELSEC iQ-R series C Controller Module R12CCPU-V all...","description":"Uncontrolled resource consumption in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V Firmware Versions \"16\" and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending a large number of packets in a short time while the module starting up. System reset is required for recovery.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.02385,"percentile":0.84059,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2021-10-08T16:42:10Z","modified":"2026-06-17T03:34:05Z","products":[{"vendor":"mitsubishielectric","product":"r12ccpu-v_firmware"}],"references":[{"url":"https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-015_en.pdf","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://jvn.jp/vu/JVNVU94914666/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-280-04","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20600"},{"url":"https://github.com/advisories/GHSA-8r87-v86x-7qm3"}],"sources":{"cve":[{"id":"CVE-2021-20600","description":"Uncontrolled resource consumption in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V Firmware Versions \"16\" and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending a large number of packets in a short time while the module starting up. System reset is required for recovery.","status":"published","published":"2021-10-08T16:42:10Z","modified":"2024-08-03T17:45:44.694Z","updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-8018","description":"Uncontrolled resource consumption in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V Firmware Versions \"16\" and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending a large number of packets in a short time while the module starting up. System reset is required for recovery.","status":"published","published":"2021-10-08T16:42:10Z","modified":"2024-08-03T17:45:44Z","updated_at":"2026-11-03T03:25:08.888273Z"}],"ghsa":[{"id":"GHSA-8r87-v86x-7qm3","title":"Uncontrolled resource consumption in MELSEC iQ-R series C Controller Module R12CCPU-V all...","description":"Uncontrolled resource consumption in MELSEC iQ-R series C Controller Module R12CCPU-V all versions allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending a large number of packets in a short time while the module starting up.","status":"published","published":"2022-05-24T19:17:02Z","modified":"2023-01-27T05:03:35Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:42:16.640621Z"}],"nvd":[{"id":"CVE-2021-20600","description":"Uncontrolled resource consumption in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V Firmware Versions \"16\" and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending a large number of packets in a short time while the module starting up. System reset is required for recovery.","status":"published","published":"2021-10-08T17:15:07.437Z","modified":"2026-06-17T03:34:05.913Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":7.1,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:06:59.689345Z"}]}}