CVE-2020-5652

HIGH
7.5
CVSS Score
Published: October 30, 2020 at 03:35 AM UTC
Updated: June 17, 2026 at 03:21 AM UTC
105 products affected across 1 vendorMELSEC L06CPU P FirmwareMELSEC L26CPU (p )bt FirmwareMELSEC L02CPU P Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 4%

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 .

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

mitsubishielectric-melsec-iq-r00cpu (same device)
mitsubishielectric-melsec-iq-r01cpu (same device)
mitsubishielectric-melsec-iq-r02cpu (same device)
mitsubishielectric-melsec-iq-r04encpu (same device)
mitsubishielectric-melsec-iq-r08encpu (same device)
All versions
mitsubishielectric-melsec-iq-r08pcpu (same device)
All versions
mitsubishielectric-melsec-iq-r08psfcpu (same device)
mitsubishielectric-r08sfcpu (same device)
mitsubishielectric-melsec-iq-r120encpu (same device)
All versions
mitsubishielectric-melsec-iq-r120pcpu (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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