CVE-2021-20827
7.5 · HIGHOverview
CVE-2021-20827 is a high-severity vulnerability affecting idec microsmart_fc6a_firmware. It was published on December 24, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from idec. Update microsmart_fc6a_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| idec | microsmart_fc6a_firmware | 0 | Affected |
| idec | microsmart_plus_fc6a_firmware | 0 | Affected |
| idec | data_file_manager | 0 | Affected |
| idec | windedit | 0 | Affected |
| idec | windldr | 0 | Affected |
Frequently Asked Questions
What is CVE-2021-20827?
CVE-2021-20827 is a high-severity vulnerability affecting idec microsmart_fc6a_firmware. It was published on December 24, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-20827?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-20827?
Check the references section for vendor advisories and patches from idec. Update microsmart_fc6a_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-20827?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-20827 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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