# CVE-2019-5620: ABB MicroSCADA Pro SYS600 Missing Authentication for Critical Function

> Attackers can access critical functions without authentication in ABB MicroSCADA Pro SYS600, potentially leading to unauthorized control or data modification.

- **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:** 29 Apr 2020
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-vf53-387h-6jj3

## What is CVE-2019-5620?

CVE-2019-5620 is a critical missing authorization vulnerability in ABB MicroSCADA Pro SYS600, published on 29 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ABB MicroSCADA Pro SYS600 version 9.3 suffers from an instance of CWE-306: Missing Authentication for Critical Function.

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

## Which versions are affected by CVE-2019-5620?

It affects 1 product.


Products: Hitachienergy Microscada Pro Sys600.

## How do I fix CVE-2019-5620?

No fix has been published for CVE-2019-5620 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-5620 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-5620 exists.

Public exploit code:

- ABB MicroSCADA wserver.exe Remote Code Execution (metasploit)

## Other vulnerabilities in ABB MicroSCADA Pro SYS600

- [CVE-2024-3980](https://insights.sbomify.com/CVE-2024-3980/): Path traversal in MicroSCADA Pro SYS600 (critical 9.9)
- [CVE-2024-4872](https://insights.sbomify.com/CVE-2024-4872/): Code injection in MicroSCADA Pro SYS600 (critical 9.9)
- [CVE-2022-3388](https://insights.sbomify.com/CVE-2022-3388/): Input Validation Vulnerability in Hitachi Energy’s MicroSCADA Pro/X SYS600 Products (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-5620 and fix it if it is affected.

What it is: CVE-2019-5620 is a critical missing authorization vulnerability in ABB MicroSCADA Pro SYS600, published on 29 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-5620 exists.

Affected product: ABB MicroSCADA Pro 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-2019-5620/ (Markdown: https://insights.sbomify.com/CVE-2019-5620/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-5620
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-5620
- OSV: https://osv.dev/vulnerability/CVE-2019-5620

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-5620/
Summaries are generated and may contain mistakes; the official description above is the record.