CVE-2021-20827

HIGH

IDEC MICROSmart FC6A Firmware < 2.32 - Cleartext Storage of Sensitive Information

Title source: llm

Description

Plaintext storage of a password 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 file servers, backup repositories, or ZLD files saved in SD cards. As a result, the attacker may access the PLC Web server and hijack the PLC, and manipulation of the PLC output and/or suspension of the PLC may be conducted.

References (2)

Core 2

Core References

Vendor Advisory x_refsource_misc

https://www.idec.com/home/lp/pdf/2021-12-24-PLC.pdf

Third Party Advisory x_refsource_misc

https://jvn.jp/en/vu/JVNVU92279973/index.html

Scores

CVSS v3 7.5

EPSS 0.0059

EPSS Percentile 43.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE

CWE-312

Status published

Products (5)

idec/data_file_manager < 2.12.1

idec/microsmart_fc6a_firmware < 2.32

idec/microsmart_plus_fc6a_firmware < 1.91

idec/windedit < 1.3.1

idec/windldr < 8.19.1

Published Dec 24, 2021

Tracked Since Feb 18, 2026