CVE-2021-37400

highpriority · track · 39EPSS 0.014 · 72 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.38% (72nd) EPSS

CVSS 7.5 · high

Is it mine?

28 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-26

An attacker may obtain the user credentials from the communication between the PLC and the software. As a result, the PLC user program may be uploaded, altered, and/or downloaded.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedData File Managercisa_csaf_ot
WindLDR: v8.20.0 and later
FixedFC6A MICROSmart All-in-One CPU Modulecisa_csaf_ot
WindLDR: v8.20.0 and later
FixedFC6A MICROSmart Plus CPU Modulecisa_csaf_ot
WindLDR: v8.20.0 and later
FixedFC6B MICROSmart All-in-One CPU Modulecisa_csaf_ot
WindLDR: v8.20.0 and later
FixedFC6B MICROSmart Plus CPU Modulecisa_csaf_ot
WindLDR: v8.20.0 and later
FixedFT1A Controller SmartAXIS Pro/Litecisa_csaf_ot
WindLDR: v8.20.0 and later
FixedWindEDITcisa_csaf_ot
WindLDR: v8.20.0 and later
FixedWindEDIT Litecisa_csaf_ot
WindLDR: v8.20.0 and later
FixedWindLDRcisa_csaf_ot
WindLDR: v8.20.0 and later
MitigationData File Managercisa_csaf_ot
Data File Manager: v2.13.0 and later
MitigationFC6A MICROSmart All-in-One CPU Modulecisa_csaf_ot
Data File Manager: v2.13.0 and later
MitigationFC6A MICROSmart Plus CPU Modulecisa_csaf_ot
Data File Manager: v2.13.0 and later
MitigationFC6B MICROSmart All-in-One CPU Modulecisa_csaf_ot
Data File Manager: v2.13.0 and later
MitigationFC6B MICROSmart Plus CPU Modulecisa_csaf_ot
Data File Manager: v2.13.0 and later
MitigationFT1A Controller SmartAXIS Pro/Litecisa_csaf_ot
Data File Manager: v2.13.0 and later
MitigationWindEDITcisa_csaf_ot
Data File Manager: v2.13.0 and later
MitigationWindEDIT Litecisa_csaf_ot
Data File Manager: v2.13.0 and later
MitigationWindLDRcisa_csaf_ot
Data File Manager: v2.13.0 and later

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.07.6highCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:Lsecondary · CISA US

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-522USprimaryCWE-523US

affected products (28)

Products and version ranges known to be affected.

Data File Manager: v2.12.1 and earlierall versionscisa_csaf_otUS
FC6A MICROSmart All-in-One CPU Module: v2.32 and earlierall versionscisa_csaf_otUS
FC6A MICROSmart Plus CPU Module: v1.91 and earlierall versionscisa_csaf_otUS
FC6B MICROSmart All-in-One CPU Module: v2.31 and earlierall versionscisa_csaf_otUS
FC6B MICROSmart Plus CPU Module: v2.31 and earlierall versionscisa_csaf_otUS
FT1A Controller SmartAXIS Pro/Lite: v2.31 and earlierall versionscisa_csaf_otUS
WindEDIT Lite: v1.3.1 and earlierall versionscisa_csaf_otUS
WindEDIT: Lite v1.3.1 and earlierall versionscisa_csaf_otUS
WindLDR: v8.19.1 and earlierall versionscisa_csaf_otUS
IDEC Data File Manager≤ 2.12.1cisa_csaf_otUS
IDEC FC6A MICROSmart All-in-One CPU Module≤ 2.32cisa_csaf_otUS
IDEC FC6A MICROSmart Plus CPU Module≤ 1.91cisa_csaf_otUS
IDEC FC6B MICROSmart All-in-One CPU Module≤ 2.31cisa_csaf_otUS
IDEC FC6B MICROSmart Plus CPU Module≤ 2.31cisa_csaf_otUS
IDEC FT1A Controller SmartAXIS Pro/Lite≤ 2.31cisa_csaf_otUS
IDEC WindEDIT≤ 1.3.1cisa_csaf_otUS
IDEC WindEDIT Lite≤ 1.3.1cisa_csaf_otUS
IDEC WindLDR≤ 8.19.1cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
idec data file manager≤ 2.12.1nvdUScpe:2.3:a:idec:data_file_manager:*:*:*:*:*:*:*:*

showing 20 of 28

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-22-006-03IDEC PLCs2022-01-06icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow an attacker to upload, alter, and/or download the PLC user program. An attacker could also access the PLC web server and hijack the controllers, resulting in the manipulation and/or suspension of the PLC output.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2021-12-28modified 2026-06-17

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references (17)

External citations — patches, advisories, analysis.

scry

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