CVE-2020-5668

HIGH
7.5
CVSS Score
Published: November 20, 2020 at 03:30 AM UTC
Updated: June 17, 2026 at 03:22 AM UTC
57 products affected across 1 vendorR120SFCPU FirmwareR08SFCPU FirmwareR32SFCPU Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 5%

Description

Uncontrolled resource consumption vulnerability in MELSEC iQ-R Series modules (R00/01/02CPU firmware version '19' and earlier, R04/08/16/32/120 (EN) CPU firmware version '51' and earlier, R08/16/32/120SFCPU firmware version '22' and earlier, R08/16/32/120PCPU firmware version '25' and earlier, R08/16/32/120PSFCPU firmware version '06' and earlier, RJ71EN71 firmware version '47' and earlier, RJ71GF11-T2 firmware version '47' and earlier, RJ72GF15-T2 firmware version '07' and earlier, RJ71GP21-SX firmware version '47' and earlier, RJ71GP21S-SX firmware version '47' and earlier, and RJ71GN11-T2 firmware version '11' and earlier) allows a remote unauthenticated attacker to cause an error in a CPU unit and cause a denial-of-service (DoS) condition in execution of the program and its communication, or to cause a denial-of-service (DoS) condition in communication via the unit by receiving a specially crafted SLMP packet

Affected

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

v ≤ 19
mitsubishielectric-r00cpu (same device)
v ≤ 19
mitsubishielectric-r01cpu (same device)
v ≤ 19
mitsubishielectric-r02cpu (same device)
v ≤ 51
mitsubishielectric-r04cpu (same device)
v ≤ 51
mitsubishielectric-r08cpu (same device)
v ≤ 25
mitsubishielectric-r08pcpu (same device)
v ≤ 6
mitsubishielectric-r08psfcpu (same device)
v ≤ 22
mitsubishielectric-r08sfcpu (same device)
v ≤ 51
mitsubishielectric-r120cpu (same device)
v ≤ 25
mitsubishielectric-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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