# CVE-2022-33323: Authentication Bypass Vulnerability in Robot Controller of MELFA SD/SQ series and F-series

> Remote unauthenticated attackers can bypass authentication via telnet to gain unauthorized access to Mitsubishi MELFA robot controllers.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Feb 2023
- **Updated:** 26 Mar 2025
- **Also known as:** GHSA-w747-g6fp-45p6

## What is CVE-2022-33323?

CVE-2022-33323 is a high-severity authentication bypass vulnerability in Mitsubishi Electric Corporation MELFA F Series Controller CR750-02VD-1 of RV-2F-D, published on 2 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Active Debug Code vulnerability in robot controller of Mitsubishi Electric Corporation industrial robot MELFA SD/SQ Series and MELFA F-Series allows a remote unauthenticated attacker to gain unauthorized access by authentication bypass through an unauthorized telnet login. As for the affected model names, controller types and firmware versions, see the Mitsubishi Electric's advisory which is listed in [References] section.

Weakness: CWE-489 (Active Debug Code)

## Which versions are affected by CVE-2022-33323?

It affects 51 products.


Products: Mitsubishielectric Rh-12fh55 Firmware, Mitsubishielectric Rh-12fh70 Firmware, Mitsubishielectric Rh-12fh85 Firmware, Mitsubishielectric Rh-12sdh55 Firmware, Mitsubishielectric Rh-12sdh70 Firmware, Mitsubishielectric Rh-12sdh85 Firmware, Mitsubishielectric Rh-12sqh55 Firmware, Mitsubishielectric Rh-12sqh70 Firmware, Mitsubishielectric Rh-12sqh85 Firmware, Mitsubishielectric Rh-20fh100 Firmware, Mitsubishielectric Rh-20fh85 Firmware, Mitsubishielectric Rh-20sdh100 Firmware, Mitsubishielectric Rh-20sdh85 Firmware, Mitsubishielectric Rh-20sqh85 Firmware, Mitsubishielectric Rh-3fh35 Firmware, Mitsubishielectric Rh-3fh45 Firmware, Mitsubishielectric Rh-3fh55 Firmware, Mitsubishielectric Rh-3sdhr Firmware, Mitsubishielectric Rh-3sqhr Firmware, Mitsubishielectric Rh-6fh35 Firmware and 31 more.

## How do I fix CVE-2022-33323?

No fix has been published for CVE-2022-33323 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-33323 being exploited?

There is no known exploitation of CVE-2022-33323 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-33323 and fix it if it is affected.

What it is: CVE-2022-33323 is a high-severity authentication bypass vulnerability in Mitsubishi Electric Corporation MELFA F Series Controller CR750-02VD-1 of RV-2F-D, published on 2 Feb 2023. 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-2022-33323 in the wild and no public exploit code.

Affected product: Mitsubishi Electric Corporation MELFA F Series Controller CR750-02VD-1 of RV-2F-D. 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-2022-33323/ (Markdown: https://insights.sbomify.com/CVE-2022-33323/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-33323
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-33323
- OSV: https://osv.dev/vulnerability/CVE-2022-33323

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-33323/
Summaries are generated and may contain mistakes; the official description above is the record.