# CVE-2021-42028: Memory corruption in syngo fastView

> An attacker can execute arbitrary code by tricking a user into opening a malicious BMP file in Siemens syngo fastView.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C`)
- **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:** 4 Jan 2024
- **Updated:** 17 Jun 2025
- **Also known as:** GHSA-p8vq-xh8f-9wx6

## What is CVE-2021-42028?

CVE-2021-42028 is a high-severity memory corruption vulnerability in Siemens syngo fastView, published on 4 Jan 2024. 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 syngo fastView (All versions). The affected application lacks proper validation of user-supplied data when parsing BMP files. This could result in an out-of-bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-14860)

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2021-42028?

It affects 1 product.


Products: Siemens-Healthineers Syngo Fastview.

## How do I fix CVE-2021-42028?

No fix has been published for CVE-2021-42028 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-42028 being exploited?

There is no known exploitation of CVE-2021-42028 in the wild and no public exploit code.

## Other vulnerabilities in Siemens syngo fastView

- [CVE-2021-40367](https://insights.sbomify.com/CVE-2021-40367/): Memory corruption in syngo fastView (high 7.8)
- [CVE-2021-45465](https://insights.sbomify.com/CVE-2021-45465/): Memory corruption in syngo fastView (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-42028 and fix it if it is affected.

What it is: CVE-2021-42028 is a high-severity memory corruption vulnerability in Siemens syngo fastView, published on 4 Jan 2024. 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-2021-42028 in the wild and no public exploit code.

Affected product: Siemens syngo fastView. 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-2021-42028/ (Markdown: https://insights.sbomify.com/CVE-2021-42028/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-42028
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-42028
- OSV: https://osv.dev/vulnerability/CVE-2021-42028

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-42028/
Summaries are generated and may contain mistakes; the official description above is the record.