{"cve":"CVE-2020-5527","nvd":{"published":"2020-03-30T08:15:17.640","modified":"2026-06-17T03:21:32.630","status":"Modified","description":"When MELSOFT transmission port (UDP/IP) of Mitsubishi Electric MELSEC iQ-R series (all versions), MELSEC iQ-F series (all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions) receives massive amount of data via unspecified vectors, resource consumption occurs and the port does not process the data properly. As a result, it may fall into a denial-of-service (DoS) condition. The vendor states this vulnerability only affects Ethernet communication functions.","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/vu/JVNVU91553662/index.html","https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2019-005_en.pdf","https://jvn.jp/en/vu/JVNVU91553662/index.html","https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2019-005_en.pdf"],"products":["mitsubishielectric:cr800-q_firmware","mitsubishielectric:fx3g_firmware","mitsubishielectric:fx3gc_firmware","mitsubishielectric:fx3s_firmware","mitsubishielectric:fx3u_firmware","mitsubishielectric:fx3uc_firmware","mitsubishielectric:fx5u_firmware","mitsubishielectric:fx5uc_firmware","mitsubishielectric:fx5uj_firmware","mitsubishielectric:l02cpu-p_firmware","mitsubishielectric:l02cpu_firmware","mitsubishielectric:l02scpu-p_firmware","mitsubishielectric:l02scpu_firmware","mitsubishielectric:l06cpu-p_firmware","mitsubishielectric:l06cpu_firmware","mitsubishielectric:l26cpu-bt_firmware","mitsubishielectric:l26cpu-p_firmware","mitsubishielectric:l26cpu-pbt_firmware","mitsubishielectric:l26cpu_firmware","mitsubishielectric:q02phcpu_firmware","mitsubishielectric:q06phcpu_firmware","mitsubishielectric:q12dccpu-v_firmware","mitsubishielectric:q12phcpu_firmware","mitsubishielectric:q12prhcpu_firmware","mitsubishielectric:q172dscpu_firmware","mitsubishielectric:q173dscpu_firmware","mitsubishielectric:q173nccpu_firmware","mitsubishielectric:q24dhccpu-ls_firmware","mitsubishielectric:q24dhccpu-v_firmware","mitsubishielectric:q24dhccpu-vg2_firmware","mitsubishielectric:q25phcpu_firmware","mitsubishielectric:q25prhcpu_firmware","mitsubishielectric:q26dhccpu-ls_firmware","mitsubishielectric:r00cpu_firmware","mitsubishielectric:r01cpu_firmware","mitsubishielectric:r02cpu_firmware","mitsubishielectric:r04cpu_firmware","mitsubishielectric:r04encpu_firmware","mitsubishielectric:r08cpu_firmware","mitsubishielectric:r08encpu_firmware","mitsubishielectric:r120cpu_firmware","mitsubishielectric:r120encpu_firmware","mitsubishielectric:r16cpu_firmware","mitsubishielectric:r16encpu_firmware","mitsubishielectric:r32cpu_firmware","mitsubishielectric:r32encpu_firmware"],"source":"nvd","synced_at":"2026-10-19T21:03:08.679916934+00:00"},"epss":{"cve":"CVE-2020-5527","score":0.01365,"percentile":0.71815,"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."]}