{"cve":"CVE-2021-20600","nvd":{"published":"2021-10-08T17:15:07.437","modified":"2026-06-17T03:34:05.913","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9},"cwes":["CWE-400"],"references":["https://jvn.jp/vu/JVNVU94914666/index.html","https://us-cert.cisa.gov/ics/advisories/icsa-21-280-04","https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-015_en.pdf","https://jvn.jp/vu/JVNVU94914666/index.html","https://us-cert.cisa.gov/ics/advisories/icsa-21-280-04"],"products":["mitsubishielectric:r12ccpu-v_firmware"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2021-20600","score":0.02385,"percentile":0.83925,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}