# CVE-2022-25622: Denial of service in SIMATIC CFU DIQ

> An attacker can cause a denial of service on Siemens SIMATIC devices by sending specially crafted TCP segments to the PROFINET stack.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Apr 2022
- **Updated:** 21 Apr 2025
- **Also known as:** GHSA-pgxc-2q22-7c2f

## What is CVE-2022-25622?

CVE-2022-25622 is a medium-severity denial of service vulnerability in Siemens SIMATIC CFU DIQ, published on 12 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The PROFINET (PNIO) stack, when integrated with the Interniche IP stack, improperly handles internal resources for TCP segments where the minimum TCP-Header length is less than defined.

This could allow an attacker to create a denial of service condition for TCP services on affected devices by sending specially crafted TCP segments.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2022-25622?

It affects 12 products.


Products: Siemens Simatic Cfu Diq Firmware, Siemens Simatic Cfu Pa Firmware, Siemens Simatic S7-1500 Cpu Firmware, Siemens Simatic S7-300 Cpu Firmware, Siemens Simatic S7-400 Pn\/Dp V7 Firmware, Siemens Simatic S7-400h V6 Firmware, Siemens Simatic S7-410 V10 Firmware, Siemens Simatic S7-410 V8 Firmware, Siemens Simatic Tdc Cp51m1 Firmware, Siemens Simatic Tdc Cpu555 Firmware, Siemens Simatic Winac Rtx Firmware, Siemens Simit Simulation Platform.

## How do I fix CVE-2022-25622?

No fix has been published for CVE-2022-25622 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-25622 being exploited?

There is no known exploitation of CVE-2022-25622 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-25622 and fix it if it is affected.

What it is: CVE-2022-25622 is a medium-severity denial of service vulnerability in Siemens SIMATIC CFU DIQ, published on 12 Apr 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-2022-25622 in the wild and no public exploit code.

Affected product: Siemens SIMATIC CFU DIQ. 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-2022-25622/ (Markdown: https://insights.sbomify.com/CVE-2022-25622/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-25622
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-25622
- OSV: https://osv.dev/vulnerability/CVE-2022-25622

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-25622/
Summaries are generated and may contain mistakes; the official description above is the record.