# CVE-2023-3935: Wibu: Buffer Overflow in CodeMeter Runtime

> Unauthenticated remote attackers can achieve remote code execution and full host access via a heap buffer overflow in Wibu CodeMeter Runtime.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Sep 2023
- **Updated:** 27 Aug 2025
- **Also known as:** GHSA-c9rf-qf73-r46f

## What is CVE-2023-3935?

CVE-2023-3935 is a critical memory corruption vulnerability in Wibu CodeMeter Runtime, published on 13 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A heap buffer overflow vulnerability in Wibu CodeMeter Runtime network service up to version 7.60b allows an unauthenticated, remote attacker to achieve RCE and gain full access of the host system.

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

## Which versions are affected by CVE-2023-3935?

It affects 24 products.


Products: Phoenixcontact Activation Wizard, Phoenixcontact E-Mobility Charging Suite, Phoenixcontact Fl Network Manager, Phoenixcontact Iol-Conf, Phoenixcontact Module Type Package Designer, Phoenixcontact Plcnext Engineer, Trumpf Oseon, Trumpf Programmingtube, Trumpf Teczonebend, Trumpf Tops Unfold, Trumpf Topscalculation, Trumpf Trumpflicenseexpert, Trumpf Trutops, Trumpf Trutops Cell Classic, Trumpf Trutops Cell Sw48, Trumpf Trutops Mark 3d, Trumpf Trutopsboost, Trumpf Trutopsfab, Trumpf Trutopsfab Storage Smallstore, Trumpf Trutopsprint and 4 more.

## How do I fix CVE-2023-3935?

No fix has been published for CVE-2023-3935 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-3935 being exploited?

There is no known exploitation of CVE-2023-3935 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-3935 and fix it if it is affected.

What it is: CVE-2023-3935 is a critical memory corruption vulnerability in Wibu CodeMeter Runtime, published on 13 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-3935 in the wild and no public exploit code.

Affected product: Wibu CodeMeter Runtime. 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-2023-3935/ (Markdown: https://insights.sbomify.com/CVE-2023-3935/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3935
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3935
- OSV: https://osv.dev/vulnerability/CVE-2023-3935

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-3935/
Summaries are generated and may contain mistakes; the official description above is the record.