# CVE-2024-39601: Security feature bypass in CPCI85 Central Processing/Communication

> Attackers can downgrade firmware to vulnerable versions, bypassing security updates in Siemens CPCI85 and SICORE devices.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Jul 2024
- **Updated:** 3 Nov 2025
- **Also known as:** GHSA-6v56-9m73-2rm4

## What is CVE-2024-39601?

CVE-2024-39601 is a high-severity vulnerability in Siemens CPCI85 Central Processing/Communication, published on 22 Jul 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V5.40), SICORE Base system (All versions < V1.4.0). Affected devices allow a remote authenticated user or an unauthenticated user with physical access to downgrade the firmware of the device. This could allow an attacker to downgrade the device to older versions with known vulnerabilities.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2024-39601?


## How do I fix CVE-2024-39601?

No fix has been published for CVE-2024-39601 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-39601 being exploited?

There is no known exploitation of CVE-2024-39601 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-39601 and fix it if it is affected.

What it is: CVE-2024-39601 is a high-severity vulnerability in Siemens CPCI85 Central Processing/Communication, published on 22 Jul 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-39601 in the wild and no public exploit code.

Affected product: Siemens CPCI85 Central Processing/Communication. 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-2024-39601/ (Markdown: https://insights.sbomify.com/CVE-2024-39601/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-39601
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-39601
- OSV: https://osv.dev/vulnerability/CVE-2024-39601

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-39601/
Summaries are generated and may contain mistakes; the official description above is the record.