# CVE-2021-37401: Information disclosure in n/a

> Attackers can extract credentials from storage media to upload, alter, or download PLC user programs, compromising industrial control systems.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-m5r3-7h55-8p6v

## What is CVE-2021-37401?

CVE-2021-37401 is a critical vulnerability in n/a, published on 28 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An attacker may obtain the user credentials from file servers, backup repositories, or ZLD files saved in SD cards. As a result, the PLC user program may be uploaded, altered, and/or downloaded.

Weakness: CWE-522 (Insufficiently Protected Credentials)

## Which versions are affected by CVE-2021-37401?

It affects 9 products.


Products: Idec Data File Manager, Idec Ft1a Smartaxix Lite Firmware, Idec Ft1a Smartaxix Pro Firmware, Idec Microsmart Fc6a Firmware, Idec Microsmart Fc6b Firmware, Idec Microsmart Plus Fc6a Firmware, Idec Microsmart Plus Fc6b Firmware, Idec Windedit, Idec Windldr.

## How do I fix CVE-2021-37401?

No fix has been published for CVE-2021-37401 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-37401 being exploited?

There is no known exploitation of CVE-2021-37401 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-37400](https://insights.sbomify.com/CVE-2021-37400/): Information disclosure in n/a (critical 9.8)
- [CVE-2021-20826](https://insights.sbomify.com/CVE-2021-20826/): Information disclosure in IDEC PLC (high 7.6)
- [CVE-2021-20827](https://insights.sbomify.com/CVE-2021-20827/): Hardcoded credentials in IDEC PLC (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-37401 and fix it if it is affected.

What it is: CVE-2021-37401 is a critical vulnerability in n/a, published on 28 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-37401 in the wild and no public exploit code.

Affected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-37401/ (Markdown: https://insights.sbomify.com/CVE-2021-37401/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-37401
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-37401
- OSV: https://osv.dev/vulnerability/CVE-2021-37401

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-37401/
Summaries are generated and may contain mistakes; the official description above is the record.