Vulnerability Details : CVE-2021-20826

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.
Published 2021-12-24 07:15:07
Updated 2022-01-11 18:18:37
Source JPCERT/CC
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-20826

EPSS FAQ
0.08%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 34 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20826

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
3.3
 LOW AV:A/AC:L/Au:N/C:P/I:N/A:N
6.5
2.9
 NIST
7.6
 HIGH CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
2.8
4.7
 NIST

CWE ids for CVE-2021-20826

  • The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-20826

Products affected by CVE-2021-20826

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