CVE-2020-5652

mediumpriority · track · 31EPSS 0.036 · 89 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.57% (89th) EPSS

CVSS 5 · medium

Is it mine?

156 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cisa_csaf_ot

EPSS · scored 2026-10-27

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 .

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMELSEC L L26 CPU - (P) BTcisa_csaf_ot
MELSEC L L26 CPU - (P) BT: Not updatable in any version
FixedMELSEC Q MR-MQ100 operating system softwarecisa_csaf_ot
MELSEC Q MR-MQ100 operating system software: Updatable in all versions
FixedMELSEC Q Q03 UDECPUcisa_csaf_ot
MELSEC Q Q03 UDECPU: Not updatable in any version
FixedMELSEC Q Q03 UDVCPUcisa_csaf_ot
MELSEC Q Q03 UDVCPU: Not updatable in any version
FixedMELSEC Q Q04 UDEHCPUcisa_csaf_ot
MELSEC Q Q04 UDEHCPU: Not updatable in any version
FixedMELSEC Q Q04 UDPVCPUcisa_csaf_ot
MELSEC Q Q04 UDPVCPU: Not updatable in any version
FixedMELSEC Q Q04 UDVCPUcisa_csaf_ot
MELSEC Q Q04 UDVCPU: Not updatable in any version
FixedMELSEC Q Q06 UDEHCPUcisa_csaf_ot
MELSEC Q Q06 UDEHCPU: Not updatable in any version
FixedMELSEC Q Q06 UDPVCPUcisa_csaf_ot
MELSEC Q Q06 UDPVCPU: Not updatable in any version
FixedMELSEC Q Q06 UDVCPUcisa_csaf_ot
MELSEC Q Q06 UDVCPU: Not updatable in any version
FixedMELSEC Q Q10 UDEHCPUcisa_csaf_ot
MELSEC Q Q10 UDEHCPU: Not updatable in any version
FixedMELSEC Q Q100 UDEHCPUcisa_csaf_ot
MELSEC Q Q100 UDEHCPU: Not updatable in any version
FixedMELSEC Q Q13 UDEHCPUcisa_csaf_ot
MELSEC Q Q13 UDEHCPU: Not updatable in any version
FixedMELSEC Q Q13 UDPVCPUcisa_csaf_ot
MELSEC Q Q13 UDPVCPU: Not updatable in any version
FixedMELSEC Q Q13 UDVCPUcisa_csaf_ot
MELSEC Q Q13 UDVCPU: Not updatable in any version
FixedMELSEC Q Q170 MCPU operating system softwarecisa_csaf_ot
MELSEC Q Q170 MCPU operating system software: Updatable in all versions
FixedMELSEC Q Q170 MSCPU(-S1) operating system softwarecisa_csaf_ot
MELSEC Q Q170 MSCPU(-S1) operating system software: Updatable in all versions
FixedMELSEC Q Q172 DCPU-S1 operating system softwarecisa_csaf_ot
MELSEC Q Q172 DCPU-S1 operating system software: Updatable in all versions
FixedMELSEC Q Q172 DSCPU operating system softwarecisa_csaf_ot
MELSEC Q Q172 DSCPU operating system software: Updatable in all versions
FixedMELSEC Q Q173 DCPU-S1 operating system softwarecisa_csaf_ot
MELSEC Q Q173 DCPU-S1 operating system software: Updatable in all versions
FixedMELSEC Q Q173 DSCPU operating system softwarecisa_csaf_ot
MELSEC Q Q173 DSCPU operating system software: Updatable in all versions
FixedMELSEC Q Q20 UDEHCPUcisa_csaf_ot
MELSEC Q Q20 UDEHCPU: Not updatable in any version
FixedMELSEC Q Q26 UDEHCPUcisa_csaf_ot
MELSEC Q Q26 UDEHCPU: Not updatable in any version
FixedMELSEC Q Q26 UDPVCPUcisa_csaf_ot
MELSEC Q Q26 UDPVCPU: Not updatable in any version
FixedMELSEC Q Q26 UDVCPUcisa_csaf_ot
MELSEC Q Q26 UDVCPU: Not updatable in any version
FixedMELSEC Q Q50 UDEHCPUcisa_csaf_ot
MELSEC Q Q50 UDEHCPU: Not updatable in any version
FixedMELSEC iQ-R R00 CPU firmwarecisa_csaf_ot
MELSEC iQ-R R00 CPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R01 CPU firmwarecisa_csaf_ot
MELSEC iQ-R R01 CPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R02 CPU firmwarecisa_csaf_ot
MELSEC iQ-R R02 CPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R04 (EN) CPU firmwarecisa_csaf_ot
MELSEC iQ-R R04 (EN) CPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R08 (EN) CPU firmwarecisa_csaf_ot
MELSEC iQ-R R08 (EN) CPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R08 PCPU firmwarecisa_csaf_ot
MELSEC iQ-R R08 PCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R08 PSFCPU firmwarecisa_csaf_ot
MELSEC iQ-R R08 PSFCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R08 SFCPU firmwarecisa_csaf_ot
MELSEC iQ-R R08 SFCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R120 (EN) CPU firmwarecisa_csaf_ot
MELSEC iQ-R R120 (EN) CPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R120 PCPU firmwarecisa_csaf_ot
MELSEC iQ-R R120 PCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R120 PSFCPU firmwarecisa_csaf_ot
MELSEC iQ-R R120 PSFCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R120 SFCPU firmwarecisa_csaf_ot
MELSEC iQ-R R120 SFCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R16 (EN) CPU firmwarecisa_csaf_ot
MELSEC iQ-R R16 (EN) CPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R16 MTCPU operating system softwarecisa_csaf_ot
MELSEC iQ-R R16 MTCPU operating system software: Updatable in all versions
FixedMELSEC iQ-R R16 PCPU firmwarecisa_csaf_ot
MELSEC iQ-R R16 PCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R16 PSFCPU firmwarecisa_csaf_ot
MELSEC iQ-R R16 PSFCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R16 SFCPU firmwarecisa_csaf_ot
MELSEC iQ-R R16 SFCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R32 (EN) CPU firmwarecisa_csaf_ot
MELSEC iQ-R R32 (EN) CPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R32 MTCPU operating system softwarecisa_csaf_ot
MELSEC iQ-R R32 MTCPU operating system software: Updatable in all versions
FixedMELSEC iQ-R R32 PCPU firmwarecisa_csaf_ot
MELSEC iQ-R R32 PCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R32 PSFCPU firmwarecisa_csaf_ot
MELSEC iQ-R R32 PSFCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R32 SFCPU firmwarecisa_csaf_ot
MELSEC iQ-R R32 SFCPU firmware: Refer to "Appendix 2 Firmware Update Function" in the MELSEC iQ-R Module Configuration Manual
FixedMELSEC iQ-R R64 MTCPU operating system softwarecisa_csaf_ot
MELSEC iQ-R R64 MTCPU operating system software: Updatable in all versions
MitigationMELSEC L L02 CPU (-P)cisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC L L06 CPU (-P)cisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC L L26 CPU (-P)cisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC L L26 CPU - (P) BTcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q MR-MQ100 operating system softwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q03 UDECPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q03 UDVCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q04 UDEHCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q04 UDPVCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q04 UDVCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q06 UDEHCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q06 UDPVCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q06 UDVCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q10 UDEHCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q100 UDEHCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q13 UDEHCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q13 UDPVCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q13 UDVCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q170 MCPU operating system softwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q170 MSCPU(-S1) operating system softwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q172 DCPU-S1 operating system softwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q172 DSCPU operating system softwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q173 DCPU-S1 operating system softwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q173 DSCPU operating system softwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q20 UDEHCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q26 UDEHCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q26 UDPVCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q26 UDVCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC Q Q50 UDEHCPUcisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R00 CPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R01 CPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R02 CPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R04 (EN) CPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R08 (EN) CPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R08 PCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R08 PSFCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R08 SFCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R120 (EN) CPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R120 PCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R120 PSFCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R120 SFCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R16 (EN) CPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R16 MTCPU operating system softwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R16 PCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R16 PSFCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R16 SFCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R32 (EN) CPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R32 MTCPU operating system softwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R32 PCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R32 PSFCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R32 SFCPU firmwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)
MitigationMELSEC iQ-R R64 MTCPU operating system softwarecisa_csaf_ot
"5.3 Operating System Software Installation Procedure" in the MR-MQ100 Motion Controller User's Manual (Details)

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USprimaryCWE-400US

affected products (156)

Products and version ranges known to be affected.

showing 20 of 156

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-20-303-01Mitsubishi Electric MELSEC iQ-R, Q, and L Series (Update E)2020-10-29icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could cause a denial-of-servicecondition in the Ethernet port on the CPU module.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot NVD CVE.org MITRE

published 2020-11-02modified 2026-06-17

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references (13)

External citations — patches, advisories, analysis.

scry

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