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Vulnerability record · CVE-2021-20587 · published 19 February 2021

CVE-2021-20587: Mitsubishielectric c controller module setting and monitoring tool heap-based buffer overflow vulnerability

Mitsubishielectric · C Controller Module Setting And Monitoring Tool

Heap-based buffer overflow vulnerability in Mitsubishi Electric FA Engineering Software (CPU Module Logging Configuration Tool versions 1.112R and prior, CW Configurator versions 1.011M and prior, Data Transfer versions 3.44W and prior, EZSocket versions 5.4 and prior, FR Configurator all versions, FR Configurator SW3 all versions, FR Configurator2 versions 1.24A and prior, GT Designer3 Version1(GOT1000) versions 1.250L and prior, GT Designer3 Version1(GOT2000) versions 1.250L and prior, GT SoftGOT1000 Version3 versions 3.245F and prior, GT SoftGOT2000 Version1 versions 1.250L and prior, GX Configurator-DP versions 7.14Q and prior, GX Configurator-QP all versions, GX Developer versions 8.506C and prior, GX Explorer all versions, GX IEC Developer all versions, GX LogViewer versions 1.115U and prior, GX RemoteService-I all versions, GX Works2 versions 1.597X and prior, GX Works3 versions 1.070Y and prior, iQ Monozukuri ANDON (Data Transfer) versions 1.003D and prior, iQ Monozukuri Process Remote Monitoring (Data Transfer) versions 1.002C and prior, M_CommDTM-HART all versions, M_CommDTM-IO-Link versions 1.03D and prior, MELFA-Works versions 4.4 and prior, MELSEC WinCPU Setting Utility all versions, MELSOFT EM Software Development Kit (EM Configurator) versions 1.015R and prior, MELSOFT Navigator versions 2.74C and prior, MH11 SettingTool Version2 versions 2.004E and prior, MI Configurator versions 1.004E and prior, MT Works2 versions 1.167Z and prior, MX Component versions 5.001B and prior, Network Interface Board CC IE Control utility versions 1.29F and prior, Network Interface Board CC IE Field Utility versions 1.16S and prior, Network Interface Board CC-Link Ver.2 Utility versions 1.23Z and prior, Network Interface Board MNETH utility versions 34L and prior, PX Developer versions 1.53F and prior, RT ToolBox2 versions 3.73B and prior, RT ToolBox3 versions 1.82L and prior, Setting/monitoring tools for the C Controller module (SW4PVC-CCPU) versions 4.12N and prior, and SLMP Data Collector versions 1.04E and prior) allows a remote unauthenticated attacker to cause a DoS condition on the software products, and possibly to execute a malicious code on the personal computer running the software products although it has not been reproduced, by spoofing MELSEC, GOT or FREQROL and returning crafted reply packets.

9.8 CVSS 3.1 Critical EPSS 3.9% · top 10.1% CWE-122 · Heap-based buffer overflowCWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 7.5
3.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
41Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

Heap-based buffer overflow vulnerability in Mitsubishi Electric FA Engineering Software (CPU Module Logging Configuration Tool versions 1.112R and prior, CW Configurator versions 1.011M and prior, Data Transfer versions 3.44W and prior, EZSocket versions 5.4 and prior, FR Configurator all versions, FR Configurator SW3 all versions, FR Configurator2 versions 1.24A and prior, GT Designer3 Version1(GOT1000) versions 1.250L and prior, GT Designer3 Version1(GOT2000) versions 1.250L and prior, GT SoftGOT1000 Version3 versions 3.245F and prior, GT SoftGOT2000 Version1 versions 1.250L and prior, GX Configurator-DP versions 7.14Q and prior, GX Configurator-QP all versions, GX Developer versions 8.506C and prior, GX Explorer all versions, GX IEC Developer all versions, GX LogViewer versions 1.115U and prior, GX RemoteService-I all versions, GX Works2 versions 1.597X and prior, GX Works3 versions 1.070Y and prior, iQ Monozukuri ANDON (Data Transfer) versions 1.003D and prior, iQ Monozukuri Process Remote Monitoring (Data Transfer) versions 1.002C and prior, M_CommDTM-HART all versions, M_CommDTM-IO-Link versions 1.03D and prior, MELFA-Works versions 4.4 and prior, MELSEC WinCPU Setting Utility all versions, MELSOFT EM Software Development Kit (EM Configurator) versions 1.015R and prior, MELSOFT Navigator versions 2.74C and prior, MH11 SettingTool Version2 versions 2.004E and prior, MI Configurator versions 1.004E and prior, MT Works2 versions 1.167Z and prior, MX Component versions 5.001B and prior, Network Interface Board CC IE Control utility versions 1.29F and prior, Network Interface Board CC IE Field Utility versions 1.16S and prior, Network Interface Board CC-Link Ver.2 Utility versions 1.23Z and prior, Network Interface Board MNETH utility versions 34L and prior, PX Developer versions 1.53F and prior, RT ToolBox2 versions 3.73B and prior, RT ToolBox3 versions 1.82L and prior, Setting/monitoring tools for the C Controller module (SW4PVC-CCPU) versions 4.12N and prior, and SLMP Data Collector versions 1.04E and prior) allows a remote unauthenticated attacker to cause a DoS condition on the software products, and possibly to execute a malicious code on the personal computer running the software products although it has not been reproduced, by spoofing MELSEC, GOT or FREQROL and returning crafted reply packets.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

41 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-6943Mitsubishielectric ezsocket vulnerabilityUse of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Mitsubishi Electric Corporation EZSocket versions…EPSS 2.1%9.8CVE-2020-14496Mitsubishielectric cpu module logging configuration tool vulnerabilitySuccessful exploitation of this vulnerability for multiple Mitsubishi Electric Factory Automation Engineering Software Products of various versions c…EPSS 0.85%9.8CVE-2020-14521Mitsubishielectric c controller interface module utility unquoted search path vulnerabilityMultiple Mitsubishi Electric Factory Automation engineering software products have a malicious code execution vulnerability. A malicious attacker cou…EPSS 1.3%9.8CVE-2020-14523Mitsubishielectric cw configurator path traversal vulnerabilityMultiple Mitsubishi Electric Factory Automation products have a vulnerability that allows an attacker to execute arbitrary code.EPSS 2.3%9.8CVE-2021-20588Mitsubishielectric c controller module setting and monitoring tool memory buffer overflow vulnerabilityImproper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric FA Engineering Software (CPU Module Logging Configuration To…EPSS 6.9%7.8CVE-2024-25086Jungo windriver code injection vulnerabilityImproper privilege management in Jungo WinDriver before 12.2.0 allows local attackers to escalate privileges and execute arbitrary code.EPSS 0.34%7.8CVE-2024-25088Jungo windriver improper privilege management vulnerabilityImproper privilege management in Jungo WinDriver before 12.5.1 allows local attackers to escalate privileges and execute arbitrary code.EPSS 0.18%7.8CVE-2024-26314Jungo windriver improper privilege management vulnerabilityImproper privilege management in Jungo WinDriver 6.0.0 through 16.1.0 allows local attackers to escalate privileges and execute arbitrary code.EPSS 0.23%

Source: NIST National Vulnerability Database (record CVE-2021-20587), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.