{"id":"CVE-2020-5652","aliases":["EUVD-2020-26813","GHSA-cpv9-4hm5-jjhj"],"status":"published","title":"Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series...","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 .","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03572,"percentile":0.89448,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2020-10-30T03:35:51Z","modified":"2026-06-17T03:21:45Z","products":[{"vendor":"mitsubishi electric corporation","product":"melsec iq-r, q and l series"},{"vendor":"mitsubishielectric","product":"melsec_iq-r00cpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r01cpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r02cpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r04encpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r08encpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r08pcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r08psfcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r08sfcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r120encpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r120pcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r120psfcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r120sfcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r16encpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r16mtcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r16pcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r16psfcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r16sfcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r32encpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r32mtcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r32pcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r32psfcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r32sfcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_iq-r64mtcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_l02cpu-p_firmware"},{"vendor":"mitsubishielectric","product":"melsec_l06cpu-p_firmware"},{"vendor":"mitsubishielectric","product":"melsec_l26cpu-p_firmware"},{"vendor":"mitsubishielectric","product":"melsec_l26cpu-pbt_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q03udecpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q03udvcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q04udehcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q04udpvcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q04udvcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q06udehcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q06udpvcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q100udehcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q10udehcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q13udehcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q13udpvcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q13udvcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q170mcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q170mscpu-s1_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q172dcpu-s1_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q172dscpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q173dcpu-s1_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q173dscpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q20udehcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q26udehcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q26udpvcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q26udvcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-q50udehcpu_firmware"},{"vendor":"mitsubishielectric","product":"melsec_q-qmr-mq100_firmware"}],"references":[{"url":"https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-013.pdf","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-013_en.pdf","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://jvn.jp/vu/JVNVU96558207/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-5652"},{"url":"https://github.com/advisories/GHSA-cpv9-4hm5-jjhj"}],"sources":{"cve":[{"id":"CVE-2020-5652","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 .","status":"published","published":"2020-10-30T03:35:51Z","modified":"2024-08-04T08:39:25.481Z","updated_at":"2026-11-02T14:35:47.56691Z"}],"euvd":[{"id":"EUVD-2020-26813","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 .","status":"published","published":"2020-10-30T03:35:51Z","modified":"2024-08-04T08:39:25Z","updated_at":"2026-11-03T03:08:06.272693Z"}],"ghsa":[{"id":"GHSA-cpv9-4hm5-jjhj","title":"Uncontrolled resource consumption vulnerability in Ethernet Port on MELSEC iQ-R, Q and L series...","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 .","status":"published","published":"2022-05-24T17:33:04Z","modified":"2023-01-29T05:04:22Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:45:32.201087Z"}],"nvd":[{"id":"CVE-2020-5652","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 .","status":"published","published":"2020-11-02T21:15:33.697Z","modified":"2026-06-17T03:21:45.807Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:06:21.80969Z"}]}}