# CVE-2024-7940: Missing authorization in MicroSCADA SYS600

> Attackers can access a local-only service via network interfaces without authentication, potentially reading data or bypassing security controls in Hitachi Energy MicroSCADA SYS600.

- **Severity:** High 8.3 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 27 Aug 2024
- **Updated:** 27 Aug 2024
- **Also known as:** GHSA-pfcw-98x8-f55c

## What is CVE-2024-7940?

CVE-2024-7940 is a high-severity missing authorization vulnerability in Hitachi Energy MicroSCADA SYS600, published on 27 Aug 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The product exposes a service that is intended for local only to
all network interfaces without any authentication.

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

## Which versions are affected by CVE-2024-7940?

It affects 1 product.


Products: Hitachienergy Microscada X Sys600.

## How do I fix CVE-2024-7940?

No fix has been published for CVE-2024-7940 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-7940 being exploited?

There is no known exploitation of CVE-2024-7940 in the wild and no public exploit code.

## Other vulnerabilities in Hitachi Energy MicroSCADA SYS600

- [CVE-2026-9853](https://insights.sbomify.com/CVE-2026-9853/): Missing authorization in MicroSCADA SYS600 (high 8.5)
- [CVE-2026-9854](https://insights.sbomify.com/CVE-2026-9854/): Privilege escalation in MicroSCADA SYS600 (high 8.5)
- [CVE-2025-39204](https://insights.sbomify.com/CVE-2025-39204/): Information disclosure in MicroSCADA X SYS600 (high 8.5)
- [CVE-2022-29490](https://insights.sbomify.com/CVE-2022-29490/): Missing authorization in MicroSCADA X SYS600 (high 8.5)
- [CVE-2025-39202](https://insights.sbomify.com/CVE-2025-39202/): Missing authorization in MicroSCADA X SYS600 (high 8.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-7940 and fix it if it is affected.

What it is: CVE-2024-7940 is a high-severity missing authorization vulnerability in Hitachi Energy MicroSCADA SYS600, published on 27 Aug 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-7940 in the wild and no public exploit code.

Affected product: Hitachi Energy MicroSCADA SYS600. 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-2024-7940/ (Markdown: https://insights.sbomify.com/CVE-2024-7940/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-7940
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-7940
- OSV: https://osv.dev/vulnerability/CVE-2024-7940

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-7940/
Summaries are generated and may contain mistakes; the official description above is the record.