# CVE-2022-47374: Denial of service in SIMATIC S7-400 CPU 412-2 PN V7

> Attackers can exhaust system resources via HTTP requests, causing denial of service on Siemens SIMATIC and SINAMICS devices.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/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 Dec 2023
- **Updated:** 25 Feb 2026
- **Also known as:** GHSA-cr2v-p345-fp24

## What is CVE-2022-47374?

CVE-2022-47374 is a high-severity denial of service vulnerability in Siemens SIMATIC S7-400 CPU 412-2 PN V7, published on 12 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been identified in SIMATIC PC-Station Plus (All versions), SIMATIC S7-400 CPU 412-2 PN V7 (All versions), SIMATIC S7-400 CPU 414-3 PN/DP V7 (All versions), SIMATIC S7-400 CPU 414F-3 PN/DP V7 (All versions), SIMATIC S7-400 CPU 416-3 PN/DP V7 (All versions), SIMATIC S7-400 CPU 416F-3 PN/DP V7 (All versions), SINAMICS S120 (incl. SIPLUS variants) (All versions < V5.2 SP3 HF15), SIPLUS S7-400 CPU 414-3 PN/DP V7 (All versions), SIPLUS S7-400 CPU 416-3 PN/DP V7 (All versions). The affected products do not handle HTTP(S) requests to the web server correctly.

This could allow an attacker to exhaust system resources and create a denial of service condition for the device.

Weakness: CWE-674 (Uncontrolled Recursion)

## Which versions are affected by CVE-2022-47374?

It affects 9 products.


Products: Siemens 6ag1414-3em07-7ab0 Firmware, Siemens 6ag1416-3es07-7ab0 Firmware, Siemens 6es7412-2ek07-0ab0 Firmware, Siemens 6es7414-3em07-0ab0 Firmware, Siemens 6es7414-3fm07-0ab0 Firmware, Siemens 6es7416-3es07-0ab0 Firmware, Siemens 6es7416-3fs07-0ab0 Firmware, Siemens Simatic Pc-Station Plus Firmware, Siemens Sinamics S120 Firmware.

## How do I fix CVE-2022-47374?

No fix has been published for CVE-2022-47374 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-47374 being exploited?

There is no known exploitation of CVE-2022-47374 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SIMATIC S7-400 CPU 412-2 PN V7

- [CVE-2022-47375](https://insights.sbomify.com/CVE-2022-47375/): Memory corruption in SIMATIC S7-400 CPU 412-2 PN V7 (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-47374 and fix it if it is affected.

What it is: CVE-2022-47374 is a high-severity denial of service vulnerability in Siemens SIMATIC S7-400 CPU 412-2 PN V7, published on 12 Dec 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-2022-47374 in the wild and no public exploit code.

Affected product: Siemens SIMATIC S7-400 CPU 412-2 PN V7. 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-2022-47374/ (Markdown: https://insights.sbomify.com/CVE-2022-47374/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-47374
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-47374
- OSV: https://osv.dev/vulnerability/CVE-2022-47374

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-47374/
Summaries are generated and may contain mistakes; the official description above is the record.