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TI-2021-04042 Aliases CVE-2021-20826GHSA-v3cv-2j8p-p6xh

Insufficiently protected credentials in IDEC PLC

Priority LOW 33CWE-522Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · Low · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-522.

Summary

Unprotected transport of credentials vulnerability in IDEC PLCs (FC6A Series MICROSmart All-in-One CPU module v2.32 and earlier, FC6A Series MICROSmart Plus CPU module v1.91 and earlier, WindLDR v8.19.1 and earlier, WindEDIT Lite v1.3.1 and earlier, and Data File Manager v2.12.1 and earlier) allows an attacker to obtain the PLC Web server user credentials from the communication between the PLC and the software. As a result, the complete access privileges to the PLC Web server may be obtained, and manipulation of the PLC output and/or suspension of the PLC may be conducted.

Why it matters now

EPSS 0.00403 34th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
IDEC CorporationIDEC PLCFC6A Series MICROSmart All-in-One CPU module v2.32 and earlier, FC6A Series MICROSmart Plus CPU module v1.91 and earlier, WindLDR v8.19.1 and earlier, WindEDIT Lite v1.3.1 and earlier, and Data File Manager v2.12.1 and earlier—No fix listedCNA
  • IDEC PLC VendorIDEC Corporation Affected FC6A Series MICROSmart All-in-One CPU module v2.32 and earlier, FC6A Series MICROSmart Plus CPU module v1.91 and earlier, WindLDR v8.19.1 and earlier, WindEDIT Lite v1.3.1 and earlier, and Data File Manager v2.12.1 and earlier Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:idec:microsmart_fc6a_firmware:*:*:*:*:*:*:*:*up to 2.32VulnerableIDEC Corporation
cpe:2.3:h:idec:microsmart_fc6a:-:*:*:*:*:*:*:*not specified by NVDRunning onIDEC Corporation
cpe:2.3:o:idec:microsmart_plus_fc6a_firmware:*:*:*:*:*:*:*:*up to 1.91VulnerableIDEC Corporation
cpe:2.3:h:idec:microsmart_plus_fc6a:-:*:*:*:*:*:*:*not specified by NVDRunning onIDEC Corporation
cpe:2.3:a:idec:data_file_manager:*:*:*:*:*:*:*:*up to 2.12.1VulnerableIDEC Corporation
cpe:2.3:a:idec:windedit:*:*:*:*:*:*:*:*up to 1.3.1VulnerableIDEC Corporation
cpe:2.3:a:idec:windldr:*:*:*:*:*:*:*:*up to 8.19.1VulnerableIDEC Corporation
  • cpe:2.3:o:idec:microsmart_fc6a_firmware:*:*:*:*:*:*:*:* Versions up to 2.32 Vulnerable ·IDEC Corporation
  • cpe:2.3:h:idec:microsmart_fc6a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IDEC Corporation
  • cpe:2.3:o:idec:microsmart_plus_fc6a_firmware:*:*:*:*:*:*:*:* Versions up to 1.91 Vulnerable ·IDEC Corporation
  • cpe:2.3:h:idec:microsmart_plus_fc6a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IDEC Corporation
  • cpe:2.3:a:idec:data_file_manager:*:*:*:*:*:*:*:* Versions up to 2.12.1 Vulnerable ·IDEC Corporation
  • cpe:2.3:a:idec:windedit:*:*:*:*:*:*:*:* Versions up to 1.3.1 Vulnerable ·IDEC Corporation
  • cpe:2.3:a:idec:windldr:*:*:*:*:*:*:*:* Versions up to 8.19.1 Vulnerable ·IDEC Corporation

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20826
  2. 2026-10-03 Alias added: GHSA-v3cv-2j8p-p6xh

References

Advisory 2

  • TI-2021-15350 An attacker may obtain the user credentials from file servers, backup repositories, or… CVSS 3.1CRITICAL 9.8
  • TI-2021-15349 An attacker may obtain the user credentials from the communication between the PLC and… CVSS 3.1CRITICAL 9.8
  • TI-2021-04043 Cleartext storage of sensitive information in IDEC PLC CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences