7.8
CVSSv2

CVE-2021-20591

Published: 11/06/2021 Updated: 22/06/2021
CVSS v2 Base Score: 7.8 | Impact Score: 6.9 | Exploitability Score: 10
CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9
VMScore: 694
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Vulnerability Summary

Uncontrolled Resource Consumption vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R00/01/02CPU all versions, R04/08/16/32/120(EN)CPU all versions, R08/16/32/120SFCPU all versions, R08/16/32/120PCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote unauthenticated malicious user to prevent legitimate clients from connecting to the MELSOFT transmission port (TCP/IP) by not closing a connection properly, which may lead to a denial of service (DoS) condition.

Vulnerability Trend

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mitsubishielectric r00cpu_firmware

mitsubishielectric r01cpu_firmware

mitsubishielectric r02cpu_firmware

mitsubishielectric r04cpu_firmware

mitsubishielectric r08cpu_firmware

mitsubishielectric r16cpu_firmware

mitsubishielectric r32cpu_firmware

mitsubishielectric r120cpu_firmware

mitsubishielectric r08sfcpu_firmware

mitsubishielectric r16sfcpu_firmware

mitsubishielectric r32sfcpu_firmware

mitsubishielectric r120sfcpu_firmware

mitsubishielectric r08pcpu_firmware

mitsubishielectric r16pcpu_firmware

mitsubishielectric r32pcpu_firmware

mitsubishielectric r120pcpu_firmware

mitsubishielectric r08psfcpu_firmware

mitsubishielectric r16psfcpu_firmware

mitsubishielectric r32psfcpu_firmware

mitsubishielectric r120psfcpu_firmware