# CVE-2022-45044: Denial of service in SIPROTEC 5 6MD84 (CP300)

> Attackers can cause a denial of service in Siemens SIPROTEC 5 devices by exploiting a resource exhaustion vulnerability.

- **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:T/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:** 13 Dec 2022
- **Updated:** 11 Nov 2025
- **Also known as:** GHSA-q2fm-89c2-x6c2

## What is CVE-2022-45044?

CVE-2022-45044 is a medium-severity denial of service vulnerability in Siemens SIPROTEC 5 6MD84 (CP300), published on 13 Dec 2022. 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 SIPROTEC 5 6MD84 (CP300) (All versions < V9.50), SIPROTEC 5 6MD85 (CP200) (All versions), SIPROTEC 5 6MD85 (CP300) (All versions < V9.50), SIPROTEC 5 6MD86 (CP200) (All versions), SIPROTEC 5 6MD86 (CP300) (All versions < V9.50), SIPROTEC 5 6MD89 (CP300) (All versions < V9.64), SIPROTEC 5 6MU85 (CP300) (All versions < V9.50), SIPROTEC 5 7KE85 (CP200) (All versions), SIPROTEC 5 7KE85 (CP300) (All versions < V9.64), SIPROTEC 5 7SA82 (CP100) (All versions < V8.90), SIPROTEC 5 7SA82 (CP150) (All versions < V9.50), SIPROTEC 5 7SA84 (CP200) (All versions), SIPROTEC 5 7SA86 (CP200) (All versions), SIPROTEC 5 7SA86 (CP300) (All versions < V9.50), SIPROTEC 5 7SA87 (CP200) (All versions), SIPROTEC 5 7SA87 (CP300) (All versions < V9.50), SIPROTEC 5 7SD82 (CP100) (All versions < V8.90), SIPROTEC 5 7SD82 (CP150) (All versions < V9.50), SIPROTEC 5 7SD84 (CP200) (All versions), SIPROTEC 5 7SD86 (CP200) (All versions), SIPROTEC 5 7SD86 (CP300) (All versions < V9.50), SIPROTEC 5 7SD87 (CP200) (All versions), SIPROTEC 5 7SD87 (CP300) (All versions < V9.50), SIPROTEC 5 7SJ81 (CP100) (All versions < V8.89), SIPROTEC 5 7SJ81 (CP150) (All versions < V9.50), SIPROTEC 5 7SJ82 (CP100) (All versions < V8.89), SIPROTEC 5 7SJ82 (CP150) (All versions < V9.50), SIPROTEC 5 7SJ85 (CP200) (All versions), SIPROTEC 5 7SJ85 (CP300) (All versions < V9.50), SIPROTEC 5 7SJ86 (CP200) (All versions), SIPROTEC 5 7SJ86 (CP300) (All versions < V9.50), SIPROTEC 5 7SK82 (CP100) (All versions < V8.89), SIPROTEC 5 7SK82 (CP150) (All versions < V9.50), SIPROTEC 5 7SK85 (CP200) (All versions), SIPROTEC 5 7SK85 (CP300) (All versions < V9.50), SIPROTEC 5 7SL82 (CP100) (All versions < V8.90), SIPROTEC 5 7SL82 (CP150) (All versions < V9.50), SIPROTEC 5 7SL86 (CP200) (All versions), SIPROTEC 5 7SL86 (CP300) (All versions < V9.50), SIPROTEC 5 7SL87 (CP200) (All versions), SIPROTEC 5 7SL87 (CP300) (All versions < V9.50), SIPROTEC 5 7SS85 (CP200) (All versions), SIPROTEC 5 7SS85 (CP300) (All versions < V9.50), SIPROTEC 5 7ST85 (CP200) (All versions), SIPROTEC 5 7ST85 (CP300) (All versions < V9.64), SIPROTEC 5 7ST86 (CP300) (All versions < V9.64), SIPROTEC 5 7SX82 (CP150) (All versions < V9.50), SIPROTEC 5 7SX85 (CP300) (All versions < V9.50), SIPROTEC 5 7UM85 (CP300) (All versions < V9.50), SIPROTEC 5 7UT82 (CP100) (All versions < V8.90), SIPROTEC 5 7UT82 (CP150) (All versions < V9.50), SIPROTEC 5 7UT85 (CP200) (All versions), SIPROTEC 5 7UT85 (CP300) (All versions < V9.50), SIPROTEC 5 7UT86 (CP200) (All versions), SIPROTEC 5 7UT86 (CP300) (All versions < V9.50), SIPROTEC 5 7UT87 (CP200) (All versions), SIPROTEC 5 7UT87 (CP300) (All versions < V9.50), SIPROTEC 5 7VE85 (CP300) (All versions < V9.50), SIPROTEC 5 7VK87 (CP200) (All versions), SIPROTEC 5 7VK87 (CP300) (All versions < V9.50), SIPROTEC 5 7VU85 (CP300) (All versions < V9.50), SIPROTEC 5 Communication Module ETH-BA-2EL (Rev.1) (All versions installed on CP200 devices), SIPROTEC 5 Communication Module ETH-BA-2EL (Rev.1) (All versions < V9.50 installed on CP150 and CP300 devices), SIPROTEC 5 Communication Module ETH-BA-2EL (Rev.1) (All versions < V8.89 installed on CP100 devices), SIPROTEC 5 Communication Module ETH-BB-2FO (Rev. 1) (All versions installed on CP200 devices), SIPROTEC 5 Communication Module ETH-BB-2FO (Rev. 1) (All versions < V9.50 installed on CP150 and CP300 devices), SIPROTEC 5 Communication Module ETH-BB-2FO (Rev. 1) (All versions < V8.89 installed on CP100 devices), SIPROTEC 5 Communication Module ETH-BD-2FO (All versions < V9.50), SIPROTEC 5 Compact 7SX800 (CP050) (All versions < V9.50). Affected devices do not properly restrict secure client-initiated renegotiations within the SSL and TLS protocols. This could allow an attacker to create a denial of service condition on the ports 443/tcp and 4443/tcp for the duration of the attack.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2022-45044?

It affects 34 products.


Products: Siemens Siprotec 5 6md85 Firmware, Siemens Siprotec 5 6md86 Firmware, Siemens Siprotec 5 6md89 Firmware, Siemens Siprotec 5 6mu85 Firmware, Siemens Siprotec 5 7ke85 Firmware, Siemens Siprotec 5 7sa82 Firmware, Siemens Siprotec 5 7sa86 Firmware, Siemens Siprotec 5 7sa87 Firmware, Siemens Siprotec 5 7sd82 Firmware, Siemens Siprotec 5 7sd86 Firmware, Siemens Siprotec 5 7sd87 Firmware, Siemens Siprotec 5 7sj81 Firmware, Siemens Siprotec 5 7sj82 Firmware, Siemens Siprotec 5 7sj85 Firmware, Siemens Siprotec 5 7sj86 Firmware, Siemens Siprotec 5 7sk82 Firmware, Siemens Siprotec 5 7sk85 Firmware, Siemens Siprotec 5 7sl82 Firmware, Siemens Siprotec 5 7sl86 Firmware, Siemens Siprotec 5 7sl87 Firmware and 14 more.

## How do I fix CVE-2022-45044?

No fix has been published for CVE-2022-45044 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-45044 being exploited?

There is no known exploitation of CVE-2022-45044 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SIPROTEC 5 6MD84 (CP300)

- [CVE-2023-28766](https://insights.sbomify.com/CVE-2023-28766/): Null dereference in SIPROTEC 5 6MD85 (CP300) (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-45044 and fix it if it is affected.

What it is: CVE-2022-45044 is a medium-severity denial of service vulnerability in Siemens SIPROTEC 5 6MD84 (CP300), published on 13 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-2022-45044 in the wild and no public exploit code.

Affected product: Siemens SIPROTEC 5 6MD84 (CP300). 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-2022-45044/ (Markdown: https://insights.sbomify.com/CVE-2022-45044/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-45044
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-45044
- OSV: https://osv.dev/vulnerability/CVE-2022-45044

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-45044/
Summaries are generated and may contain mistakes; the official description above is the record.