{"cve":"CVE-2020-16850","nvd":{"published":"2020-11-30T22:15:10.840","modified":"2026-06-17T02:58:08.433","status":"Modified","description":"Mitsubishi MELSEC iQ-R Series PLCs with firmware 49 allow an unauthenticated attacker to halt the industrial process by sending a crafted packet over the network. This denial of service attack exposes Improper Input Validation. After halting, physical access to the PLC is required in order to restore production, and the device state is lost. This is related to R04CPU, RJ71GF11-T2, R04CPU, and RJ71GF11-T2.","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-20","CWE-400"],"references":["https://blog.scadafence.com/vulnerability-in-mitsubishi-electric-melsec-iq-r-series","https://us-cert.cisa.gov/ics/advisories/icsa-20-282-02","https://blog.scadafence.com/vulnerability-in-mitsubishi-electric-melsec-iq-r-series","https://us-cert.cisa.gov/ics/advisories/icsa-20-282-02"],"products":["mitsubishielectric:r00cpu_firmware","mitsubishielectric:r01cpu_firmware","mitsubishielectric:r02cpu_firmware","mitsubishielectric:r04cpu_firmware","mitsubishielectric:r08cpu_firmware","mitsubishielectric:r08pcpu_firmware","mitsubishielectric:r08sfcpu_firmware","mitsubishielectric:r120cpu_firmware","mitsubishielectric:r120pcpu_firmware","mitsubishielectric:r120sfcpu_firmware","mitsubishielectric:r16cpu_firmware","mitsubishielectric:r16mtcpu_firmware","mitsubishielectric:r16pcpu_firmware","mitsubishielectric:r16sfcpu_firmware","mitsubishielectric:r32cpu_firmware","mitsubishielectric:r32mtcpu_firmware","mitsubishielectric:r32pcpu_firmware","mitsubishielectric:r32sfcpu_firmware","mitsubishielectric:r64mtcpu_firmware"],"source":"nvd","synced_at":"2026-10-19T21:11:20.317016139+00:00"},"epss":{"cve":"CVE-2020-16850","score":0.02143,"percentile":0.8207,"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."]}