{"cve":"CVE-2020-5652","nvd":{"published":"2020-11-02T21:15:33.697","modified":"2026-06-17T03:21:45.807","status":"Modified","description":"Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series CPU modules (R 00/01/02 CPU firmware versions '20' and earlier, R 04/08/16/32/120 (EN) CPU firmware versions '52' and earlier, R 08/16/32/120 SFCPU firmware versions '22' and earlier, R 08/16/32/120 PCPU all versions, R 08/16/32/120 PSFCPU all versions, R 16/32/64 MTCPU all versions, Q03 UDECPU, Q 04/06/10/13/20/26/50/100 UDEHCPU serial number '22081' and earlier , Q 03/04/06/13/26 UDVCPU serial number '22031' and earlier, Q 04/06/13/26 UDPVCPU serial number '22031' and earlier, Q 172/173 DCPU all versions, Q 172/173 DSCPU all versions, Q 170 MCPU all versions, Q 170 MSCPU all versions, L 02/06/26 CPU (-P) and L 26 CPU - (P) BT all versions) allows a remote unauthenticated attacker to stop the Ethernet communication functions of the products via a specially crafted packet, which may lead to a denial of service (DoS) condition .","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/vu/JVNVU96558207/index.html","https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-013.pdf","https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-013_en.pdf","https://jvn.jp/vu/JVNVU96558207/index.html","https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-013.pdf"],"products":["mitsubishielectric:melsec_iq-r00cpu_firmware","mitsubishielectric:melsec_iq-r01cpu_firmware","mitsubishielectric:melsec_iq-r02cpu_firmware","mitsubishielectric:melsec_iq-r04encpu_firmware","mitsubishielectric:melsec_iq-r08encpu_firmware","mitsubishielectric:melsec_iq-r08pcpu_firmware","mitsubishielectric:melsec_iq-r08psfcpu_firmware","mitsubishielectric:melsec_iq-r08sfcpu_firmware","mitsubishielectric:melsec_iq-r120encpu_firmware","mitsubishielectric:melsec_iq-r120pcpu_firmware","mitsubishielectric:melsec_iq-r120psfcpu_firmware","mitsubishielectric:melsec_iq-r120sfcpu_firmware","mitsubishielectric:melsec_iq-r16encpu_firmware","mitsubishielectric:melsec_iq-r16mtcpu_firmware","mitsubishielectric:melsec_iq-r16pcpu_firmware","mitsubishielectric:melsec_iq-r16psfcpu_firmware","mitsubishielectric:melsec_iq-r16sfcpu_firmware","mitsubishielectric:melsec_iq-r32encpu_firmware","mitsubishielectric:melsec_iq-r32mtcpu_firmware","mitsubishielectric:melsec_iq-r32pcpu_firmware","mitsubishielectric:melsec_iq-r32psfcpu_firmware","mitsubishielectric:melsec_iq-r32sfcpu_firmware","mitsubishielectric:melsec_iq-r64mtcpu_firmware","mitsubishielectric:melsec_l02cpu-p_firmware","mitsubishielectric:melsec_l06cpu-p_firmware","mitsubishielectric:melsec_l26cpu-p_firmware","mitsubishielectric:melsec_l26cpu-pbt_firmware","mitsubishielectric:melsec_q-q03udecpu_firmware","mitsubishielectric:melsec_q-q03udvcpu_firmware","mitsubishielectric:melsec_q-q04udehcpu_firmware","mitsubishielectric:melsec_q-q04udpvcpu_firmware","mitsubishielectric:melsec_q-q04udvcpu_firmware","mitsubishielectric:melsec_q-q06udehcpu_firmware","mitsubishielectric:melsec_q-q06udpvcpu_firmware","mitsubishielectric:melsec_q-q100udehcpu_firmware","mitsubishielectric:melsec_q-q10udehcpu_firmware","mitsubishielectric:melsec_q-q13udehcpu_firmware","mitsubishielectric:melsec_q-q13udpvcpu_firmware","mitsubishielectric:melsec_q-q13udvcpu_firmware","mitsubishielectric:melsec_q-q170mcpu_firmware","mitsubishielectric:melsec_q-q170mscpu-s1_firmware","mitsubishielectric:melsec_q-q172dcpu-s1_firmware","mitsubishielectric:melsec_q-q172dscpu_firmware","mitsubishielectric:melsec_q-q173dcpu-s1_firmware","mitsubishielectric:melsec_q-q173dscpu_firmware","mitsubishielectric:melsec_q-q20udehcpu_firmware","mitsubishielectric:melsec_q-q26udehcpu_firmware","mitsubishielectric:melsec_q-q26udpvcpu_firmware","mitsubishielectric:melsec_q-q26udvcpu_firmware","mitsubishielectric:melsec_q-q50udehcpu_firmware"],"source":"nvd","synced_at":"2026-10-19T21:11:20.317016139+00:00"},"epss":{"cve":"CVE-2020-5652","score":0.03572,"percentile":0.89369,"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."]}