Vulnerability Details : CVE-2021-20827
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.
Products affected by CVE-2021-20827
- cpe:2.3:o:idec:microsmart_plus_fc6a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:idec:microsmart_fc6a_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:a:idec:data_file_manager:*:*:*:*:*:*:*:*
- cpe:2.3:a:idec:windedit:*:*:*:*:*:*:*:*
- cpe:2.3:a:idec:windldr:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20827
0.15%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 51 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20827
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-20827
-
The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-20827
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https://jvn.jp/en/vu/JVNVU92279973/index.html
JVNVU#92279973: Multiple vulnerabilities in IDEC PLCsThird Party Advisory
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https://www.idec.com/home/lp/pdf/2021-12-24-PLC.pdf
Vendor Advisory
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