CRITICAL
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
Published Feb 19, 2021
9.8
CRITICALCVSS 3.1
EPSS 3.89%
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.
Affected products
- Vendor Mitsubishi Electric Corporation Product CPU Module Logging Configuration Tool Defaultunaffected
- Version 1.112R and priorStatusaffectedConstraints-
- Version
-
- Version 1.011M and priorStatusaffectedConstraints-
- Version
-
- Version 3.44W and priorStatusaffectedConstraints-
- Version
-
- Version 5.4 and priorStatusaffectedConstraints-
- Version
-
- Version all versionsStatusaffectedConstraints-
- Version
-
- Version all versionsStatusaffectedConstraints-
- Version
-
- Version 1.24A and priorStatusaffectedConstraints-
- Version
-
- Version 1.250L and priorStatusaffectedConstraints-
- Version
-
- Version 1.250L and priorStatusaffectedConstraints-
- Version
-
- Version 3.245F and priorStatusaffectedConstraints-
- Version
-
- Version 1.250L and priorStatusaffectedConstraints-
- Version
-
- Version 7.14Q and priorStatusaffectedConstraints-
- Version
-
- Version all versionsStatusaffectedConstraints-
- Version
-
- Version 8.506C and priorStatusaffectedConstraints-
- Version
-
- Version all versionsStatusaffectedConstraints-
- Version
-
- Version all versionsStatusaffectedConstraints-
- Version
-
- Version 1.115U and priorStatusaffectedConstraints-
- Version
-
- Version all versionsStatusaffectedConstraints-
- Version
-
- Version 1.597X and priorStatusaffectedConstraints-
- Version
-
- Version 1.070Y and priorStatusaffectedConstraints-
- Version
-
- Version 4.4 and priorStatusaffectedConstraints-
- Version
-
- Version all versionsStatusaffectedConstraints-
- Version
- Vendor Mitsubishi Electric Corporation Product MELSOFT EM Software Development Kit (EM Configurator) Defaultunaffected
- Version 1.015R and priorStatusaffectedConstraints-
- Version
-
- Version 2.74C and priorStatusaffectedConstraints-
- Version
-
- Version 2.004E and priorStatusaffectedConstraints-
- Version
-
- Version 1.004E and priorStatusaffectedConstraints-
- Version
-
- Version 1.167Z and priorStatusaffectedConstraints-
- Version
-
- Version 5.001B and priorStatusaffectedConstraints-
- Version
-
- Version all versionsStatusaffectedConstraints-
- Version
-
- Version 1.03D and priorStatusaffectedConstraints-
- Version
- Vendor Mitsubishi Electric Corporation Product Network Interface Board CC IE Control utility Defaultunaffected
- Version 1.29F and priorStatusaffectedConstraints-
- Version
- Vendor Mitsubishi Electric Corporation Product Network Interface Board CC IE Field Utility Defaultunaffected
- Version 1.16S and priorStatusaffectedConstraints-
- Version
- Vendor Mitsubishi Electric Corporation Product Network Interface Board CC-Link Ver.2 Utility Defaultunaffected
- Version 1.23Z and priorStatusaffectedConstraints-
- Version
- Vendor Mitsubishi Electric Corporation Product Network Interface Board MNETH utility Defaultunaffected
- Version 34L and priorStatusaffectedConstraints-
- Version
-
- Version 1.53F and priorStatusaffectedConstraints-
- Version
-
- Version 3.73B and priorStatusaffectedConstraints-
- Version
-
- Version 1.82L and priorStatusaffectedConstraints-
- Version
-
- Version 1.04E and priorStatusaffectedConstraints-
- Version
- Vendor Mitsubishi Electric Corporation Product Setting/monitoring tools for the C Controller module (SW4PVC-CCPU) Defaultunaffected
- Version 4.12N and priorStatusaffectedConstraints-
- Version
- Vendor Mitsubishi Electric Corporation Product iQ Monozukuri ANDON (Data Transfer) Defaultunaffected
- Version 1.003D and priorStatusaffectedConstraints-
- Version
- Vendor Mitsubishi Electric Corporation Product iQ Monozukuri Process Remote Monitoring (Data Transfer) Defaultunaffected
- Version 1.002C and priorStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mitsubishi Electric Corporation | CPU Module Logging Configuration Tool | unaffected |
| ||||||
| Mitsubishi Electric Corporation | CW Configurator | unaffected |
| ||||||
| Mitsubishi Electric Corporation | Data Transfer | unaffected |
| ||||||
| Mitsubishi Electric Corporation | EZSocket | unaffected |
| ||||||
| Mitsubishi Electric Corporation | FR Configurator | unaffected |
| ||||||
| Mitsubishi Electric Corporation | FR Configurator SW3 | unaffected |
| ||||||
| Mitsubishi Electric Corporation | FR Configurator2 | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GT Designer3 Version1(GOT1000) | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GT Designer3 Version1(GOT2000) | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GT SoftGOT1000 Version3 | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GT SoftGOT2000 Version1 | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GX Configurator-DP | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GX Configurator-QP | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GX Developer | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GX Explorer | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GX IEC Developer | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GX LogViewer | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GX RemoteService-I | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GX Works2 | unaffected |
| ||||||
| Mitsubishi Electric Corporation | GX Works3 | unaffected |
| ||||||
| Mitsubishi Electric Corporation | MELFA-Works | unaffected |
| ||||||
| Mitsubishi Electric Corporation | MELSEC WinCPU Setting Utility | unaffected |
| ||||||
| Mitsubishi Electric Corporation | MELSOFT EM Software Development Kit (EM Configurator) | unaffected |
| ||||||
| Mitsubishi Electric Corporation | MELSOFT Navigator | unaffected |
| ||||||
| Mitsubishi Electric Corporation | MH11 SettingTool Version2 | unaffected |
| ||||||
| Mitsubishi Electric Corporation | MI Configurator | unaffected |
| ||||||
| Mitsubishi Electric Corporation | MT Works2 | unaffected |
| ||||||
| Mitsubishi Electric Corporation | MX Component | unaffected |
| ||||||
| Mitsubishi Electric Corporation | M CommDTM-HART | unaffected |
| ||||||
| Mitsubishi Electric Corporation | M CommDTM-IO-Link | unaffected |
| ||||||
| Mitsubishi Electric Corporation | Network Interface Board CC IE Control utility | unaffected |
| ||||||
| Mitsubishi Electric Corporation | Network Interface Board CC IE Field Utility | unaffected |
| ||||||
| Mitsubishi Electric Corporation | Network Interface Board CC-Link Ver.2 Utility | unaffected |
| ||||||
| Mitsubishi Electric Corporation | Network Interface Board MNETH utility | unaffected |
| ||||||
| Mitsubishi Electric Corporation | PX Developer | unaffected |
| ||||||
| Mitsubishi Electric Corporation | RT ToolBox2 | unaffected |
| ||||||
| Mitsubishi Electric Corporation | RT ToolBox3 | unaffected |
| ||||||
| Mitsubishi Electric Corporation | SLMP Data Collector | unaffected |
| ||||||
| Mitsubishi Electric Corporation | Setting/monitoring tools for the C Controller module (SW4PVC-CCPU) | unaffected |
| ||||||
| Mitsubishi Electric Corporation | iQ Monozukuri ANDON (Data Transfer) | unaffected |
| ||||||
| Mitsubishi Electric Corporation | iQ Monozukuri Process Remote Monitoring (Data Transfer) | unaffected |
|
OR
- n/a
- ≤ 1.112r
- ≤ 1.011m
- ≤ 3.44w
- n/a
- n/a
- n/a
- ≤ 1.24a
- ≤ 1.250l
- ≤ 3.245f
- ≤ 1.250l
- ≤ 7.14q
- n/a
- ≤ 8.506c
- n/a
- n/a
- ≤ 1.115u
- n/a
- ≤ 1.597x
- ≤ 1.070y
- n/a
- n/a
- n/a
- n/a
- ≤ 4.4
- n/a
- n/a
- ≤ 2.74c
- ≤ 2.004e
- n/a
- ≤ 1.167z
- ≤ 5.001b
- n/a
- n/a
- n/a
- n/a
- ≤ 1.53f
- ≤ 3.73b
- ≤ 1.82l
- n/a
- ≤ 1.04e
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
1 other source (CVE.org) ▾
7.5 HIGH CVE.org
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
No CVSS v3.0 score for this CVE.
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.89% 0.03886
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03886
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.89% (0.03886) | 89.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.66% (0.03663) | 88.16th | v5 (v2026.06.15) |
| Feb 21, 2026 | 11.75% (0.11751) | 93.55th | v4 (v2025.03.14) |
| Nov 24, 2025 | 9.01% (0.09006) | 92.28th | v4 (v2025.03.14) |
| Nov 21, 2025 | 4.49% (0.04492) | 88.62th | v4 (v2025.03.14) |
| Nov 18, 2025 | 15.29% (0.15293) | 94.03th | v4 (v2025.03.14) |
| Nov 9, 2025 | 4.49% (0.04492) | 88.59th | v4 (v2025.03.14) |
| Jul 4, 2025 | 6.95% (0.06952) | 90.98th | v4 (v2025.03.14) |
| Jun 17, 2025 | 8.72% (0.08721) | 92.01th | v4 (v2025.03.14) |
| Jun 13, 2025 | 6.95% (0.06952) | 90.94th | v4 (v2025.03.14) |
| May 26, 2025 | 2.96% (0.02963) | 85.83th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.68% (0.01677) | 80.49th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.04% (0.03041) | 77.72th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.68% (0.01677) | 80.92th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.89% (0.01894) | 88.20th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.71% (0.00712) | 79.86th | v3 (v2023.03.01) |
| Nov 5, 2023 | 0.69% (0.00686) | 77.90th | v3 (v2023.03.01) |
| Sep 26, 2023 | 0.62% (0.00622) | 76.37th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.45% (0.00447) | 71.83th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.43% (0.00431) | 70.53th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 10, 2022 | 12.49% (0.12492) | 89.90th | v2 (v2022.01.01) |
| Feb 4, 2022 | 9.03% (0.09029) | 86.86th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.43% (0.03427) | 68.31th | v5 (v2026.06.15) |
| Jan 6, 2022 | 3.43% (0.03427) | 68.01th | v1 |
| Sep 1, 2021 | 0.78% (0.00785) | 52.07th | v1 |
| Apr 14, 2021 | 0.78% (0.00785) | 0.00th | v1 |
Weaknesses (2)
References (6)
- https://jvn.jp/vu/JVNVU92330101 government-resource
- https://jvn.jp/vu/JVNVU92330101/index.html Third Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-049-02 Third Party AdvisoryUS Government Resource
- https://www.cisa.gov/news-events/ics-advisories/icsa-21-049-02 government-resource
- https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-021_en.pdf Vendor Advisory
- https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2020-021_en.pdf vendor-advisory
| Link | Providers | Tags |
|---|---|---|
| https://jvn.jp/vu/JVNVU92330101 | government-resource | |
| https://jvn.jp/vu/JVNVU92330101/index.html | Third Party Advisory | |
| https://us-cert.cisa.gov/ics/advisories/icsa-21-049-02 | Third Party AdvisoryUS Government Resource | |
| https://www.cisa.gov/news-events/ics-advisories/icsa-21-049-02 | government-resource | |
| https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-021_en.pdf | Vendor Advisory | |
| https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2020-021_en.pdf | vendor-advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner Mitsubishi
Published Feb 19, 2021
Updated Jun 12, 2025
Reserved Dec 17, 2020
Link CVE-2021-20587
CISA Vulnrichment
Updated n/a