# CVE-2021-27389: Hardcoded credentials in Opcenter Quality

> Siemens Opcenter Quality and QMS Automotive ship with an unprotected private signing key, allowing attackers to bypass security controls or access data.

- **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:** 22 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-wrq7-4jj9-f6rc

## What is CVE-2021-27389?

CVE-2021-27389 is a critical vulnerability in Siemens Opcenter Quality, published on 22 Apr 2021. 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 Opcenter Quality (All versions < V12.2), QMS Automotive (All versions < V12.30). A private sign key is shipped with the product without adequate protection.

Weakness: CWE-321 (Use of Hard-coded Cryptographic Key)

## Which versions are affected by CVE-2021-27389?

It affects 2 products.


Products: Siemens Opcenter Quality, Siemens Qms Automotive.

## How do I fix CVE-2021-27389?

No fix has been published for CVE-2021-27389 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27389 being exploited?

There is no known exploitation of CVE-2021-27389 in the wild and no public exploit code.

## Other vulnerabilities in Siemens Opcenter Quality

- [CVE-2024-41979](https://insights.sbomify.com/CVE-2024-41979/): Missing authorization in SOA Audit (high 7.5)
- [CVE-2023-46283](https://insights.sbomify.com/CVE-2023-46283/): Memory corruption in Opcenter Execution Foundation (high 7.5)
- [CVE-2023-46284](https://insights.sbomify.com/CVE-2023-46284/): Memory corruption in Opcenter Execution Foundation (high 7.5)
- [CVE-2023-46285](https://insights.sbomify.com/CVE-2023-46285/): Denial of service in Opcenter Execution Foundation (high 7.5)
- [CVE-2022-33736](https://insights.sbomify.com/CVE-2022-33736/): Auth bypass in Opcenter Quality V13.1 (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27389 and fix it if it is affected.

What it is: CVE-2021-27389 is a critical vulnerability in Siemens Opcenter Quality, published on 22 Apr 2021. 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-2021-27389 in the wild and no public exploit code.

Affected product: Siemens Opcenter Quality. 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-2021-27389/ (Markdown: https://insights.sbomify.com/CVE-2021-27389/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27389
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27389
- OSV: https://osv.dev/vulnerability/CVE-2021-27389

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27389/
Summaries are generated and may contain mistakes; the official description above is the record.