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Fencer Intel
high 7.5

CVE-2021-20587 json

Heap-based buffer overflow vulnerability in Mitsubishi Electric FA Engineering Software (CPU Module Logging Configuration Tool versions 1.1…

published 5y ago modified 4mo ago also EUVD-2021-8005

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.9%
EPSS 3.9% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

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.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-049-02 updated cvss 7.5

Mitsubishi Electric FA Engineering Software Products (Update H)

  • Mitsubishi Electric CPU Module Logging Configuration Tool <=1.112R Mitsubishi Electric CW Configurator <=1.011M Mitsubishi Electric Data Transfer <=3.44W Mitsubishi Electric EZSocket <=5.4 Mitsubishi Electric FR Configurator Mitsubishi Electric FR Configurator SW3
    +1 more products
    Mitsubishi Electric FR Configurator2 <=1.24A
    affected: vendor fix, mitigation “Mitsubishi Electric has released updated versions for the following products to address these vulnerabilities. Please download and install the update from the Mitsubishi Electric download site.:” mitsubishielectric.com
  • Mitsubishi Electric GT Designer3 Version1(GOT1000) <=1.250L Mitsubishi Electric GT Designer3 Version1(GOT2000) <=1.250L
    affected: mitigation “Mitsubishi Electric has released updated versions for the following products to address these vulnerabilities. Please download and install the update from the Mitsubishi Electric download site.:” mitsubishielectric.com
  • Mitsubishi Electric GT SoftGOT1000 Version3 <=3.245F Mitsubishi Electric GT SoftGOT2000 Version1 <=1.250L Mitsubishi Electric GX Configurator-DP <=7.14Q Mitsubishi Electric GX Configurator-QP Mitsubishi Electric GX Developer <=8.506C Mitsubishi Electric GX Explorer
    +5 more products
    Mitsubishi Electric GX IEC Developer Mitsubishi Electric GX LogViewer <=1.115U Mitsubishi Electric GX RemoteService-I Mitsubishi Electric GX Works2 <=1.597X Mitsubishi Electric GX Works3 <=1.070Y
    affected: vendor fix, mitigation “Mitsubishi Electric has released updated versions for the following products to address these vulnerabilities. Please download and install the update from the Mitsubishi Electric download site.:” mitsubishielectric.com
  • Mitsubishi Electric iQ Monozukuri ANDON (Data Transfer) <=1.003D Mitsubishi Electric iQ Monozukuri Process Remote Monitoring (Data Transfer) <=1.002C
    affected: mitigation “Mitsubishi Electric has released updated versions for the following products to address these vulnerabilities. Please download and install the update from the Mitsubishi Electric download site.:” mitsubishielectric.com
  • Mitsubishi Electric M_CommDTM-HART Mitsubishi Electric M_CommDTM-IO-Link <=1.03D Mitsubishi Electric MELFA-Works <=4.4 Mitsubishi Electric MELSEC WinCPU Setting Utility
    affected: vendor fix, mitigation “Mitsubishi Electric has released updated versions for the following products to address these vulnerabilities. Please download and install the update from the Mitsubishi Electric download site.:” mitsubishielectric.com
  • Mitsubishi Electric MELSOFT EM Software Development Kit (EM Configurator) <=1.015R
    affected: mitigation “Mitsubishi Electric has released updated versions for the following products to address these vulnerabilities. Please download and install the update from the Mitsubishi Electric download site.:” mitsubishielectric.com
  • Mitsubishi Electric MELSOFT Navigator <=2.74C Mitsubishi Electric MH11 SettingTool Version2 <=2.004E Mitsubishi Electric MI Configurator <=1.004E Mitsubishi Electric MT Works2 <=1.167Z Mitsubishi Electric MX Component <=5.001B Mitsubishi Electric Network Interface Board CC IE Control utility <=1.29F
    +6 more products
    Mitsubishi Electric Network Interface Board CC IE Field Utility <=1.16S Mitsubishi Electric Network Interface Board CC-Link Ver.2 Utility <=1.23Z Mitsubishi Electric Network Interface Board MNETH utility <=34L Mitsubishi Electric PX Developer <=1.53F Mitsubishi Electric RT ToolBox2 <=3.73B Mitsubishi Electric RT ToolBox3 <=1.82L
    affected: vendor fix, mitigation “Mitsubishi Electric has released updated versions for the following products to address these vulnerabilities. Please download and install the update from the Mitsubishi Electric download site.:” mitsubishielectric.com
  • Mitsubishi Electric Setting/monitoring tools for the C Controller module (SW4PVC-CCPU) <=4.12N
    affected: mitigation “Mitsubishi Electric has released updated versions for the following products to address these vulnerabilities. Please download and install the update from the Mitsubishi Electric download site.:” mitsubishielectric.com

1 more affected in the full advisory

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

3.89% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Mitsubishi Electric Corporation CPU Module Logging Configuration Tool
  • Mitsubishi Electric Corporation CW Configurator
  • Mitsubishi Electric Corporation Data Transfer
  • Mitsubishi Electric Corporation EZSocket
  • Mitsubishi Electric Corporation FR Configurator
  • Mitsubishi Electric Corporation FR Configurator SW3
  • Mitsubishi Electric Corporation FR Configurator2
  • Mitsubishi Electric Corporation GT Designer3 Version1(GOT1000)
  • Mitsubishi Electric Corporation GT Designer3 Version1(GOT2000)
  • Mitsubishi Electric Corporation GT SoftGOT1000 Version3
  • Mitsubishi Electric Corporation GT SoftGOT2000 Version1
  • Mitsubishi Electric Corporation GX Configurator-DP
  • Mitsubishi Electric Corporation GX Configurator-QP
  • Mitsubishi Electric Corporation GX Developer
  • Mitsubishi Electric Corporation GX Explorer
  • Mitsubishi Electric Corporation GX IEC Developer
  • Mitsubishi Electric Corporation GX LogViewer
  • Mitsubishi Electric Corporation GX RemoteService-I
  • Mitsubishi Electric Corporation GX Works2
  • Mitsubishi Electric Corporation GX Works3
  • Mitsubishi Electric Corporation iQ Monozukuri ANDON (Data Transfer)
  • Mitsubishi Electric Corporation iQ Monozukuri Process Remote Monitoring (Data Transfer)
  • Mitsubishi Electric Corporation M_CommDTM-HART
  • Mitsubishi Electric Corporation M_CommDTM-IO-Link
  • Mitsubishi Electric Corporation MELFA-Works
  • Mitsubishi Electric Corporation MELSEC WinCPU Setting Utility
  • Mitsubishi Electric Corporation MELSOFT EM Software Development Kit (EM Configurator)
  • Mitsubishi Electric Corporation MELSOFT Navigator
  • Mitsubishi Electric Corporation MH11 SettingTool Version2
  • Mitsubishi Electric Corporation MI Configurator
  • Mitsubishi Electric Corporation MT Works2
  • Mitsubishi Electric Corporation MX Component
  • Mitsubishi Electric Corporation Network Interface Board CC IE Control utility
  • Mitsubishi Electric Corporation Network Interface Board CC IE Field Utility
  • Mitsubishi Electric Corporation Network Interface Board CC-Link Ver.2 Utility
  • Mitsubishi Electric Corporation Network Interface Board MNETH utility
  • Mitsubishi Electric Corporation PX Developer
  • Mitsubishi Electric Corporation RT ToolBox2
  • Mitsubishi Electric Corporation RT ToolBox3
  • Mitsubishi Electric Corporation Setting/monitoring tools for the C Controller module (SW4PVC-CCPU)
  • Mitsubishi Electric Corporation SLMP Data Collector

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.