# CVE-2023-25620: Denial of service in Legacy Modicon Premium CPUs (TSXP57*)

> An authenticated user can cause denial of service on Schneider Modicon PLCs by loading a malicious project file.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **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:** 19 Apr 2023
- **Updated:** 5 Feb 2025
- **Also known as:** GHSA-jp8p-mv2j-qxc2

## What is CVE-2023-25620?

CVE-2023-25620 is a medium-severity denial of service vulnerability in Schneider Electric Legacy Modicon Premium CPUs (TSXP57*), published on 19 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that
could cause denial of service of the controller when a malicious project file is loaded onto the
controller by an authenticated user.

Weakness: CWE-754 (Improper Check for Unusual or Exceptional Conditions)

## Which versions are affected by CVE-2023-25620?

It affects 8 products.


Products: Schneider-Electric 140cpu65 Firmware, Schneider-Electric Bmeh58s Firmware, Schneider-Electric Bmep58s Firmware, Schneider-Electric Modicon M340 Firmware, Schneider-Electric Modicon M580 Firmware, Schneider-Electric Modicon Mc80 Firmware, Schneider-Electric Modicon Momentum Unity M1e Processor Firmware, Schneider-Electric Tsxp57 Firmware.

## How do I fix CVE-2023-25620?

No fix has been published for CVE-2023-25620 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-25620 being exploited?

There is no known exploitation of CVE-2023-25620 in the wild and no public exploit code.

## Other vulnerabilities in Schneider Electric Legacy Modicon Premium CPUs (TSXP57*)

- [CVE-2020-7534](https://insights.sbomify.com/CVE-2020-7534/): Cross-site request forgery in Modicon M340 CPUs: BMXP34 (All Versions), Modicon Quantum CPUs with integrated Ethernet (Copro): 140CPU65 (All Versions), Modicon Premium CPUs with integrated Ethernet (Copro): TSXP57 (All Versions), Modicon M340 ethernet modules: (BMXNOC0401, BMXNOE01, BMXNOR0200H) (All Versions), Modicon Quantum and Premium factory cast communication modules: (140NOE77111, 140NOC78*00, TSXETY5103, TSXETY4103) (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-25620 and fix it if it is affected.

What it is: CVE-2023-25620 is a medium-severity denial of service vulnerability in Schneider Electric Legacy Modicon Premium CPUs (TSXP57*), published on 19 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-25620 in the wild and no public exploit code.

Affected product: Schneider Electric Legacy Modicon Premium CPUs (TSXP57*). 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-2023-25620/ (Markdown: https://insights.sbomify.com/CVE-2023-25620/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-25620
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-25620
- OSV: https://osv.dev/vulnerability/CVE-2023-25620

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-25620/
Summaries are generated and may contain mistakes; the official description above is the record.