CVE-2021-20827

HIGH
7.5
CVSS Score
Published: December 24, 2021 at 06:30 AM UTC
Updated: June 17, 2026 at 03:34 AM UTC
8 products affected across 1 vendorWindLDRData File ManagerMicrosmart FC6A Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 2.32
idec-microsmart-fc6a (same device)
v ≤ 1.91
idec-microsmart-plus-fc6a (same device)
v ≤ 1.3.1
v ≤ 8.19.1
v ≤ 2.32
All versions
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-312

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