# CVE-2025-7405: Missing authorization in MELSEC iQ-F Series FX5S-30MR/DS

> Remote attackers can read, modify, or stop PLC operations due to missing authentication in MODBUS/TCP, impacting industrial control systems.

- **Severity:** High 7.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2025
- **Updated:** 2 Sep 2025

## What is CVE-2025-7405?

CVE-2025-7405 is a high-severity missing authorization vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MR/DS, published on 1 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series CPU module allows a remote unauthenticated attacker to read or write the device values of the product and stop the operation of the programs, since MODBUS/TCP in the products does not have authentication features.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2025-7405?


## How do I fix CVE-2025-7405?

No fix has been published for CVE-2025-7405 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-7405 being exploited?

There is no known exploitation of CVE-2025-7405 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-7405 and fix it if it is affected.

What it is: CVE-2025-7405 is a high-severity missing authorization vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MR/DS, published on 1 Sep 2025. 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-2025-7405 in the wild and no public exploit code.

Affected product: Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-30MR/DS. 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-2025-7405/ (Markdown: https://insights.sbomify.com/CVE-2025-7405/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-7405
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-7405
- OSV: https://osv.dev/vulnerability/CVE-2025-7405

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-7405/
Summaries are generated and may contain mistakes; the official description above is the record.