{"cve":"CVE-2020-5653","nvd":{"published":"2020-11-02T21:15:33.757","modified":"2026-06-17T03:21:45.983","status":"Modified","description":"Buffer overflow vulnerability in TCP/IP function included in the firmware of MELSEC iQ-R series (RJ71EIP91 EtherNet/IP Network Interface Module First 2 digits of serial number are '02' or before, RJ71PN92 PROFINET IO Controller Module First 2 digits of serial number are '01' or before, RD81DL96 High Speed Data Logger Module First 2 digits of serial number are '08' or before, RD81MES96N MES Interface Module First 2 digits of serial number are '04' or before, and RD81OPC96 OPC UA Server Module First 2 digits of serial number are '04' or before) allows a remote unauthenticated attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-120"],"references":["https://jvn.jp/vu/JVNVU92513419/index.html","https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-012.pdf","https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-012_en.pdf","https://jvn.jp/vu/JVNVU92513419/index.html","https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-012.pdf"],"products":["mitsubishielectric:melsec_iq-rd81dl96_firmware","mitsubishielectric:melsec_iq-rd81mes96n_firmware","mitsubishielectric:melsec_iq-rd81opc96_firmware","mitsubishielectric:melsec_iq-rj71eip91_firmware","mitsubishielectric:melsec_iq-rj71pn92_firmware"],"source":"nvd","synced_at":"2026-10-19T21:11:20.317016139+00:00"},"epss":{"cve":"CVE-2020-5653","score":0.03209,"percentile":0.88167,"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."]}