{"cve":"CVE-2020-5666","nvd":{"published":"2020-11-16T01:15:13.327","modified":"2026-06-17T03:22:03.860","status":"Modified","description":"Uncontrolled resource consumption vulnerability in MELSEC iQ-R Series CPU Modules (R00/01/02CPU Firmware versions from '05' to '19' and R04/08/16/32/120(EN)CPU Firmware versions from '35' to '51') allows a remote attacker to cause an error in a CPU unit via a specially crafted HTTP packet, which may lead to a denial-of-service (DoS) condition in execution of the program and its communication.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://jvn.jp/en/jp/JVN44764844/index.html","https://jvn.jp/jp/JVN44764844/index.html","https://us-cert.cisa.gov/ics/advisories/icsa-20-317-01","https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-015_en.pdf","https://jvn.jp/en/jp/JVN44764844/index.html"],"products":["mitsubishielectric:melsec_iq-r00_firmware","mitsubishielectric:melsec_iq-r01_firmware","mitsubishielectric:melsec_iq-r02_firmware","mitsubishielectric:melsec_iq-r04_firmware","mitsubishielectric:melsec_iq-r08_firmware","mitsubishielectric:melsec_iq-r120_firmware","mitsubishielectric:melsec_iq-r16_firmware","mitsubishielectric:melsec_iq-r32_firmware"],"source":"nvd","synced_at":"2026-10-19T21:11:20.317016139+00:00"},"epss":{"cve":"CVE-2020-5666","score":0.08754,"percentile":0.95162,"date":"2026-11-01"},"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."]}