# CVE-2019-10996: Use after free in Red Lion Controls Crimson (Windows configuration software)

> A use-after-free vulnerability in Red Lion Controls Crimson allows attackers to execute arbitrary code by tricking a user into opening a malicious file.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 23 Sep 2019
- **Updated:** 2 Jun 2026
- **Also known as:** GHSA-64r3-ghpg-5p63

## What is CVE-2019-10996?

CVE-2019-10996 is a high-severity use after free vulnerability in Red Lion Controls Crimson (Windows configuration software), published on 23 Sep 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Red Lion Controls Crimson, version 3.0 and prior and version 3.1 prior to release 3112.00, allow multiple vulnerabilities to be exploited when a valid user opens a specially crafted, malicious input file that can reference memory after it has been freed.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2019-10996?

It affects 1 product.


Products: Redlion Crimson.

## How do I fix CVE-2019-10996?

No fix has been published for CVE-2019-10996 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-10996 being exploited?

There is no known exploitation of CVE-2019-10996 in the wild and no public exploit code.

## Other vulnerabilities in Red Lion Controls Crimson (Windows configuration software)

- [CVE-2023-5719](https://insights.sbomify.com/CVE-2023-5719/): Red Lion Crimson Improper Neutralization of Null Byte or NUL Character (high 8.8)
- [CVE-2019-10984](https://insights.sbomify.com/CVE-2019-10984/): Memory corruption in Red Lion Controls Crimson (Windows configuration software) (high 7.8)
- [CVE-2022-3090](https://insights.sbomify.com/CVE-2022-3090/): Path traversal in Crimson 3.0 (high 7.5)
- [CVE-2020-27279](https://insights.sbomify.com/CVE-2020-27279/): A NULL pointer deference vulnerability has been identified in the protocol converter. (high 7.5)
- [CVE-2020-27285](https://insights.sbomify.com/CVE-2020-27285/): The default configuration of Crimson 3.1 (Build versions prior to 3119.001) allows a user to be able to read and modify the database without authentication. (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-10996 and fix it if it is affected.

What it is: CVE-2019-10996 is a high-severity use after free vulnerability in Red Lion Controls Crimson (Windows configuration software), published on 23 Sep 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-10996 in the wild and no public exploit code.

Affected product: Red Lion Controls Crimson (Windows configuration software). 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-2019-10996/ (Markdown: https://insights.sbomify.com/CVE-2019-10996/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-10996
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-10996
- OSV: https://osv.dev/vulnerability/CVE-2019-10996

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-10996/
Summaries are generated and may contain mistakes; the official description above is the record.