# CVE-2021-22643: Memory corruption in Luxion KeyShot

> An out-of-bounds read in Luxion KeyShot products allows attackers to execute arbitrary code via malicious project files.

- **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 Feb 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-5f6x-vc29-3295

## What is CVE-2021-22643?

CVE-2021-22643 is a high-severity memory corruption vulnerability in Luxion KeyShot, published on 23 Feb 2021. 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

Luxion KeyShot versions prior to 10.1, Luxion KeyShot Viewer versions prior to 10.1, Luxion KeyShot Network Rendering versions prior to 10.1, and Luxion KeyVR versions prior to 10.1 are vulnerable to an out-of-bounds read while processing project files, which may allow an attacker to execute arbitrary code.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2021-22643?

It affects 6 products.


Products: Luxion Keyshot, Luxion Keyshot Network Rendering, Luxion Keyshot Viewer, Luxion Keyvr, Siemens Solid Edge Se2020 Firmware, Siemens Solid Edge Se2021 Firmware.

## How do I fix CVE-2021-22643?

No fix has been published for CVE-2021-22643 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-22643 being exploited?

There is no known exploitation of CVE-2021-22643 in the wild and no public exploit code.

## Other vulnerabilities in Luxion KeyShot

- [CVE-2025-7222](https://insights.sbomify.com/CVE-2025-7222/): Luxion KeyShot 3DM File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability (high 7.8)
- [CVE-2025-1045](https://insights.sbomify.com/CVE-2025-1045/): Luxion KeyShot Viewer KSP File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability (high 7.8)
- [CVE-2025-1046](https://insights.sbomify.com/CVE-2025-1046/): Luxion KeyShot SKP File Parsing Use-After-Free Remote Code Execution Vulnerability (high 7.8)
- [CVE-2025-1047](https://insights.sbomify.com/CVE-2025-1047/): Luxion KeyShot PVS File Parsing Access of Uninitialized Pointer Remote Code Execution Vulnerability (high 7.8)
- [CVE-2025-2530](https://insights.sbomify.com/CVE-2025-2530/): Luxion KeyShot DAE File Parsing Access of Uninitialized Pointer Remote Code Execution Vulnerability (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-22643 and fix it if it is affected.

What it is: CVE-2021-22643 is a high-severity memory corruption vulnerability in Luxion KeyShot, published on 23 Feb 2021. 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-2021-22643 in the wild and no public exploit code.

Affected product: Luxion KeyShot. 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-2021-22643/ (Markdown: https://insights.sbomify.com/CVE-2021-22643/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-22643
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-22643
- OSV: https://osv.dev/vulnerability/CVE-2021-22643

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-22643/
Summaries are generated and may contain mistakes; the official description above is the record.