CVE-2021-20826

HIGH

IDEC MICROSmart FC6A Firmware < 2.32 - Unprotected Credential Exposure via PLC-Software Communication

Title source: llm

Description

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.

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 7.6

EPSS 0.0039

EPSS Percentile 30.6%

Attack Vector ADJACENT_NETWORK

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

Details

CWE

CWE-522

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