CVE-2021-37400
An attacker may obtain the user credentials from the communication between the PLC and the...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-37400- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-522
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-37400- Updated
- 2026-11-02
EUVDEUVD-2021-23969 No score
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.
- Record
EUVD-2021-23969- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gv42-v83p-3gw3 No score
An attacker may obtain the user credentials from the communication between the PLC and the...
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.
- Record
GHSA-gv42-v83p-3gw3- Weakness
- CWE-522
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-37400 is a critical vulnerability (CVSS 9.8) in Idec Data File Manager, published December 28, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.38%, the 72nd percentile. No source names a fixed version.
References
us.idec.com/idec-us/en/USD/Programmable-Logic-Controller/Micro-PLC/FC6A-MicroSmart/c/MicroSmart_FC6A
idec.com/home/lp/pdf/2021-12-24-PLC.pdf
jvn.jp/en/vu/JVNVU92279973
nvd.nist.gov/vuln/detail/CVE-2021-37400
github.com/advisories/GHSA-gv42-v83p-3gw3