CVE-2021-20587
No exploitation reported by the sources we read.
- Published2021-02-19
- WeaknessCWE-122 · CWE-787
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2021-02-1920:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-20587?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-20587?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.112 | ≤ 1.112r | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.11 | ≤ 1.011m | no fix published | NVD |
38 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
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 · +38 more
Fix
- Vendor fix CISA ICSA-21-049-02 · 1 productCPU Module Logging Configuration Tool: Version 1.118X or later
- Vendor fix CISA ICSA-21-049-02 · 1 productCW Configurator: Version 1.012N or later
- Vendor fix CISA ICSA-21-049-02 · 1 productData Transfer: Version 3.45X or later
- Vendor fix CISA ICSA-21-049-02 · 1 productEZSocket: Version 5.5 or later
- Vendor fix CISA ICSA-21-049-02 · 1 productFR Configurator2: Version 1.25B or later
- Vendor fix CISA ICSA-21-049-02 · 1 productGT SoftGOT1000 Version3: Version 3.255R or later
Advisories and patches
- www.mitsubishielectric.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2021-02-19
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-20587?
Is CVE-2021-20587 actively exploited?
What is the CVSS score for CVE-2021-20587?
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