# CVE-2023-53966: SOUND4 LinkAndShare Transmitter 1.1.2 Format String Stack Buffer Overflow

> Attackers can execute arbitrary code or crash the transmitter by exploiting a format string vulnerability in environment variables.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Dec 2025
- **Updated:** 22 Dec 2025
- **Also known as:** GHSA-xh8h-mfrv-w6wh

## What is CVE-2023-53966?

CVE-2023-53966 is a critical memory corruption vulnerability in SOUND4 LinkAndShare Transmitter, published on 22 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SOUND4 LinkAndShare Transmitter 1.1.2 contains a format string vulnerability that allows attackers to trigger memory stack overflows through maliciously crafted environment variables. Attackers can manipulate the username environment variable with format string payloads to potentially execute arbitrary code and crash the application.

Weakness: CWE-134 (Use of Externally-Controlled Format String)

## Which versions are affected by CVE-2023-53966?

It affects 1 product.


Products: Sound4 Linkandshare Transmitter.

## How do I fix CVE-2023-53966?

No fix has been published for CVE-2023-53966 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-53966 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53966 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-53966 and fix it if it is affected.

What it is: CVE-2023-53966 is a critical memory corruption vulnerability in SOUND4 LinkAndShare Transmitter, published on 22 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53966 exists.

Affected product: SOUND4 LinkAndShare Transmitter. 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-2023-53966/ (Markdown: https://insights.sbomify.com/CVE-2023-53966/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-53966
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-53966
- OSV: https://osv.dev/vulnerability/CVE-2023-53966

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-53966/
Summaries are generated and may contain mistakes; the official description above is the record.