# CVE-2022-3270: Incomplete Documentation of remote functions in FESTO products.

> Remote attackers can exploit undocumented protocol functions in Festo bus modules to compromise confidentiality, integrity, and availability.

- **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:** 1 Dec 2022
- **Updated:** 24 Apr 2025
- **Also known as:** GHSA-v7vr-mf26-79cm

## What is CVE-2022-3270?

CVE-2022-3270 is a critical vulnerability in Festo SE Bus module CPX-E-EP, published on 1 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In multiple products by Festo a remote unauthenticated attacker could use functions of an undocumented  protocol which could lead to a complete loss of confidentiality, integrity and availability.

Weakness: CWE-1059 (Insufficient Technical Documentation)

## Which versions are affected by CVE-2022-3270?

It affects 99 products.


Products: Festo Bus Module Cpx-E-Ep Firmware, Festo Bus Node Cpx-Fb32 Firmware, Festo Bus Node Cpx-Fb33 Firmware, Festo Bus Node Cpx-Fb36 Firmware, Festo Bus Node Cpx-Fb37 Firmware, Festo Bus Node Cpx-Fb39 Firmware, Festo Bus Node Cpx-Fb40 Firmware, Festo Bus Node Cpx-Fb43 Firmware, Festo Bus Node Cpx-M-Fb34 Firmware, Festo Bus Node Cpx-M-Fb35 Firmware, Festo Bus Node Cpx-M-Fb44 Firmware, Festo Bus Node Cpx-M-Fb45 Firmware, Festo Bus Node Cteu-Ep Firmware, Festo Bus Node Cteu-Pn-Ex1c Firmware, Festo Bus Node Cteu-Pn Firmware, Festo Camera System Chb-C-N Firmware, Festo Cecx-X-C1 Modular Master Controller Firmware, Festo Cecx-X-M1 Modular Controller Firmware, Festo Compact Vision System Sboc-C Firmware, Festo Compact Vision System Sboc-M Firmware and 79 more.

## How do I fix CVE-2022-3270?

No fix has been published for CVE-2022-3270 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-3270 being exploited?

There is no known exploitation of CVE-2022-3270 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-3270 and fix it if it is affected.

What it is: CVE-2022-3270 is a critical vulnerability in Festo SE Bus module CPX-E-EP, published on 1 Dec 2022. 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-2022-3270 in the wild and no public exploit code.

Affected product: Festo SE Bus module CPX-E-EP. 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-2022-3270/ (Markdown: https://insights.sbomify.com/CVE-2022-3270/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-3270
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-3270
- OSV: https://osv.dev/vulnerability/CVE-2022-3270

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-3270/
Summaries are generated and may contain mistakes; the official description above is the record.