Heap-based buffer overflow vulnerability in Mitsubishi Electric FA Engineering Software (CPU Module Logging Configuration Tool versions 1.11
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
- Updated
- Jun 16, 2026
- EPSS
- 3.9% · 90th percentile
- CWE
- CWE-122
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Report tools
Action score
40
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 3.9%
CNA vs NVD score
- NVD
- 9.8
- CNA · Mitsubishi
- 7.5
- 2.3 point gap
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| mitsubishielectric | c controller module setting and monitoring tool | cpe:2.3:a:mitsubishielectric:c_controller_module_setting_and_monitoring_tool |
| mitsubishielectric | cpu module logging configuration tool | cpe:2.3:a:mitsubishielectric:cpu_module_logging_configuration_tool |
| mitsubishielectric | cw configurator | cpe:2.3:a:mitsubishielectric:cw_configurator |
| mitsubishielectric | data transfer | cpe:2.3:a:mitsubishielectric:data_transfer |
| mitsubishielectric | ezsocket | cpe:2.3:a:mitsubishielectric:ezsocket |
| mitsubishielectric | fr configurator | cpe:2.3:a:mitsubishielectric:fr_configurator |
| mitsubishielectric | fr configurator sw3 | cpe:2.3:a:mitsubishielectric:fr_configurator_sw3 |
| mitsubishielectric | fr configurator2 | cpe:2.3:a:mitsubishielectric:fr_configurator2 |
| mitsubishielectric | gt designer3 | cpe:2.3:a:mitsubishielectric:gt_designer3 |
| mitsubishielectric | gt softgot1000 | cpe:2.3:a:mitsubishielectric:gt_softgot1000 |
| mitsubishielectric | gt softgot2000 | cpe:2.3:a:mitsubishielectric:gt_softgot2000 |
| mitsubishielectric | gx configurator-dp | cpe:2.3:a:mitsubishielectric:gx_configurator-dp |
and 29 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- mitsubishielectric c controller module setting and monitoring toolall versions
- mitsubishielectric cpu module logging configuration toolup to 1.112r inclusive
- mitsubishielectric cw configuratorup to 1.011m inclusive
- mitsubishielectric data transferup to 3.44w inclusive
- mitsubishielectric ezsocketall versions
- mitsubishielectric fr configuratorall versions
- mitsubishielectric fr configurator sw3all versions
- mitsubishielectric fr configurator2up to 1.24a inclusive
- mitsubishielectric gt designer3up to 1.250l inclusive
- mitsubishielectric gt softgot1000up to 3.245f inclusive
- mitsubishielectric gt softgot2000up to 1.250l inclusive
- mitsubishielectric gx configurator-dpup to 7.14q inclusive
- mitsubishielectric gx configurator-qpall versions
- mitsubishielectric gx developerup to 8.506c inclusive
- mitsubishielectric gx explorerall versions
- mitsubishielectric gx iec developerall versions
- mitsubishielectric gx logviewerup to 1.115u inclusive
- mitsubishielectric gx remoteservice-iall versions
- mitsubishielectric gx works2up to 1.597x inclusive
- mitsubishielectric gx works3up to 1.070y inclusive
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Mitsubishi). Independent of NVD's CPE analysis and usually ahead of it.
Mitsubishi Electric Corporation CPU Module Logging Configuration Tool
- 1.112R and prioraffected
Mitsubishi Electric Corporation CW Configurator
- 1.011M and prioraffected
Mitsubishi Electric Corporation Data Transfer
- 3.44W and prioraffected
Mitsubishi Electric Corporation EZSocket
- 5.4 and prioraffected
Mitsubishi Electric Corporation FR Configurator
- all versionsaffected
Mitsubishi Electric Corporation FR Configurator SW3
- all versionsaffected
Mitsubishi Electric Corporation FR Configurator2
- 1.24A and prioraffected
Mitsubishi Electric Corporation GT Designer3 Version1(GOT1000)
- 1.250L and prioraffected
Mitsubishi Electric Corporation GT Designer3 Version1(GOT2000)
- 1.250L and prioraffected
Mitsubishi Electric Corporation GT SoftGOT1000 Version3
- 3.245F and prioraffected
Mitsubishi Electric Corporation GT SoftGOT2000 Version1
- 1.250L and prioraffected
Mitsubishi Electric Corporation GX Configurator-DP
- 7.14Q and prioraffected
Same product
mitsubishielectric: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-20588Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric FA Engineering Software (CPU Module Logging Configu41Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-122 · Heap-based Buffer OverflowCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- jvn.jp/vu/JVNVU92330101
- www.cisa.gov/news-events/ics-advisories/icsa-21-049-02
- www.mitsubishielectric.com/psirt/vulnerability/pdf/2020-021_en.pdf
- jvn.jp/vu/JVNVU92330101/index.html
- us-cert.cisa.gov/ics/advisories/icsa-21-049-02
- www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-021_en.pdf
Vendor advisories and official records. Exploit/PoC links are deliberately left out.