# CVE-2021-44222: Missing authorization in SIMATIC eaSie Core Package

> Unauthenticated remote attackers can send arbitrary messages to the MQTT service, potentially issuing arbitrary requests in the system.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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:** 12 Jul 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-4mhg-63jh-q754

## What is CVE-2021-44222?

CVE-2021-44222 is a critical missing authorization vulnerability in Siemens SIMATIC eaSie Core Package, published on 12 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been identified in SIMATIC eaSie Core Package (All versions < V22.00). The underlying MQTT service of affected systems does not perform authentication in the default configuration. This could allow an unauthenticated remote attacker to send arbitrary messages to the service and thereby issue arbitrary requests in the affected system.

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

## Which versions are affected by CVE-2021-44222?

It affects 1 product.


Products: Siemens Simatic Easie Core Package.

## How do I fix CVE-2021-44222?

No fix has been published for CVE-2021-44222 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-44222 being exploited?

There is no known exploitation of CVE-2021-44222 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SIMATIC eaSie Core Package

- [CVE-2021-44221](https://insights.sbomify.com/CVE-2021-44221/): Denial of service in SIMATIC eaSie Core Package (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-44222 and fix it if it is affected.

What it is: CVE-2021-44222 is a critical missing authorization vulnerability in Siemens SIMATIC eaSie Core Package, published on 12 Jul 2022. 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-2021-44222 in the wild and no public exploit code.

Affected product: Siemens SIMATIC eaSie Core Package. 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-2021-44222/ (Markdown: https://insights.sbomify.com/CVE-2021-44222/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-44222
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-44222
- OSV: https://osv.dev/vulnerability/CVE-2021-44222

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-44222/
Summaries are generated and may contain mistakes; the official description above is the record.