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01 Record

CVE-2021-20600

Uncontrolled resource consumption in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V Firmware Versions "16" and prior allows a remote unauthenticated attacker to cause a

UnratedPUBLISHEDCNA: Mitsubishi
CNA base scoreUnratedNo CNA CVSS vector
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02 Description

Uncontrolled resource consumption in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V Firmware Versions "16" and prior allows a remote unauthenticated attacker to cause a

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
2.38% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 83.4% of scored records. A rank, not a probability.
NVD base score
5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-10-08 16:42Z5 YR AGO
Last updated
2024-08-03 17:45Z2 YR AGO
Reserved
2020-12-17
Assigning CNA
Mitsubishi
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-400Uncontrolled Resource ConsumptionClass
Data version
5.1
Document digest
6114e6bcff2f27bcdaf6d5be05ad8b7ebad9f9ba0439c2ab5eabd1c2c6d0dea1

05 Affected products

VendorProductVersionsPlatforms
n/aMitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-VMitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V Firmware Versions "16" and prior—

06 References