# CVE-2022-40266: Denial-of-Service (DoS) Vulnerability in FTP Server Function on GOT2000 Series

> A remote authenticated attacker can cause a denial of service on Mitsubishi Electric GOT2000 series HMI FTP servers by sending specially crafted commands.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Nov 2022
- **Updated:** 25 Apr 2025
- **Also known as:** GHSA-7mj5-7wjc-fw8c

## What is CVE-2022-40266?

CVE-2022-40266 is a medium-severity denial of service vulnerability in Mitsubishi Electric GOT2000 Series GT23 model, published on 24 Nov 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Improper Input Validation vulnerability in Mitsubishi Electric GOT2000 Series GT27 model FTP server versions 01.39.000 and prior, Mitsubishi Electric GOT2000 Series GT25 model FTP server versions 01.39.000 and prior and Mitsubishi Electric GOT2000 Series GT23 model FTP server versions 01.39.000 and prior allows a remote authenticated attacker to cause a Denial of Service condition by sending specially crafted command.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2022-40266?

It affects 3 products.


Products: Mitsubishielectric Got2000 Gt23 Firmware, Mitsubishielectric Got2000 Gt25 Firmware, Mitsubishielectric Got2000 Gt27 Firmware.

## How do I fix CVE-2022-40266?

No fix has been published for CVE-2022-40266 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-40266 being exploited?

There is no known exploitation of CVE-2022-40266 in the wild and no public exploit code.

## Other vulnerabilities in Mitsubishi Electric GOT2000 Series GT23 model

- [CVE-2021-20592](https://insights.sbomify.com/CVE-2021-20592/): Race condition in GOT2000 series GT27 model; GT25 model; GT23 model; GT SoftGOT2000 (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-40266 and fix it if it is affected.

What it is: CVE-2022-40266 is a medium-severity denial of service vulnerability in Mitsubishi Electric GOT2000 Series GT23 model, published on 24 Nov 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-40266 in the wild and no public exploit code.

Affected product: Mitsubishi Electric GOT2000 Series GT23 model. 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-2022-40266/ (Markdown: https://insights.sbomify.com/CVE-2022-40266/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-40266
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-40266
- OSV: https://osv.dev/vulnerability/CVE-2022-40266

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-40266/
Summaries are generated and may contain mistakes; the official description above is the record.