# CVE-2022-41851: Null dereference in JTTK

> An attacker can execute arbitrary code by tricking a user into opening a specially crafted JT file in applications using the vulnerable JTTK library.

- **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:** 11 Oct 2022
- **Updated:** 20 May 2025
- **Also known as:** GHSA-4xcw-w9g9-vg97

## What is CVE-2022-41851?

CVE-2022-41851 is a high-severity vulnerability in Siemens Simcenter Femap, published on 11 Oct 2022. 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

A vulnerability has been identified in JTTK (All versions < V11.1.1.0), Simcenter Femap V2022.1 (All versions < V2022.1.3), Simcenter Femap V2022.2 (All versions < V2022.2.2). The JTTK library is vulnerable to an uninitialized pointer reference vulnerability while parsing specially crafted JT files. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-16973)

Weakness: CWE-824 (Access of Uninitialized Pointer)

## Which versions are affected by CVE-2022-41851?

It affects 2 products.


Products: Siemens Jt Open Toolkit, Siemens Simcenter Femap.

## How do I fix CVE-2022-41851?

No fix has been published for CVE-2022-41851 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-41851 being exploited?

There is no known exploitation of CVE-2022-41851 in the wild and no public exploit code.

## Other vulnerabilities in Siemens Simcenter Femap

- [CVE-2023-30796](https://insights.sbomify.com/CVE-2023-30796/): Memory corruption in JT Open (high 7.8)
- [CVE-2023-29053](https://insights.sbomify.com/CVE-2023-29053/): Memory corruption in JT Open (high 7.8)
- [CVE-2022-47936](https://insights.sbomify.com/CVE-2022-47936/): Memory corruption in JT Open (high 7.8)
- [CVE-2022-47977](https://insights.sbomify.com/CVE-2022-47977/): Memory corruption in JT Open (high 7.8)
- [CVE-2022-47935](https://insights.sbomify.com/CVE-2022-47935/): Memory corruption in JT Open (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-41851 and fix it if it is affected.

What it is: CVE-2022-41851 is a high-severity vulnerability in Siemens Simcenter Femap, published on 11 Oct 2022. 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-2022-41851 in the wild and no public exploit code.

Affected product: Siemens Simcenter Femap. 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-2022-41851/ (Markdown: https://insights.sbomify.com/CVE-2022-41851/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-41851
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-41851
- OSV: https://osv.dev/vulnerability/CVE-2022-41851

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-41851/
Summaries are generated and may contain mistakes; the official description above is the record.