# CVE-2021-27660: C-CURE 9000

> Insecure auto-update in C-CURE 9000 allows remote execution of lower-privileged Windows programs, posing risks to physical security operations.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Jul 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-2cfq-h45g-8h84

## What is CVE-2021-27660?

CVE-2021-27660 is a high-severity code injection vulnerability in Johnson Controls C-CURE 9000, published on 1 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An insecure client auto update feature in C-CURE 9000 can allow remote execution of lower privileged Windows programs.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2021-27660?

It affects 1 product.


Products: Johnsoncontrols C-Cure 9000 Firmware.

## How do I fix CVE-2021-27660?

No fix has been published for CVE-2021-27660 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27660 being exploited?

There is no known exploitation of CVE-2021-27660 in the wild and no public exploit code.

## Other vulnerabilities in Johnson Controls C-CURE 9000

- [CVE-2020-9045](https://insights.sbomify.com/CVE-2020-9045/): Information disclosure in American Dynamics victor Video Management System v5.2 (critical 9.9)
- [CVE-2021-36201](https://insights.sbomify.com/CVE-2021-36201/): CCURE Observable Response Discrepancy (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27660 and fix it if it is affected.

What it is: CVE-2021-27660 is a high-severity code injection vulnerability in Johnson Controls C-CURE 9000, published on 1 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-27660 in the wild and no public exploit code.

Affected product: Johnson Controls C-CURE 9000. 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-2021-27660/ (Markdown: https://insights.sbomify.com/CVE-2021-27660/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27660
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27660
- OSV: https://osv.dev/vulnerability/CVE-2021-27660

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27660/
Summaries are generated and may contain mistakes; the official description above is the record.