# CVE-2020-7489: Code injection in SoMachine Basic (all versions)EcoStruxure Machine Expert – Basic (all versions)Modicon M100 Logic Controller (all versions)Modicon M200 Logic Controller (all versions)Modicon M221 Logic Controller (all versions)

> Attackers can inject malicious code into PLC controllers via DLL substitution in Schneider Electric programming software.

- **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:** 22 Apr 2020
- **Updated:** 28 May 2026
- **Also known as:** GHSA-9jpc-mpc7-cwp7

## What is CVE-2020-7489?

CVE-2020-7489 is a critical code injection vulnerability in SoMachine Basic (all versions)EcoStruxure Machine Expert – Basic (all versions)Modicon M100 Logic Controller (all versions)Modicon M200 Logic Controller (all versions)Modicon M221 Logic Controller (all versions), published on 22 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability exists on EcoStruxure Machine Expert – Basic or SoMachine Basic programming software (versions in security notification). The result of this vulnerability, DLL substitution, could allow the transference of malicious code to the controller.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2020-7489?

It affects 5 products.


Products: Schneider-Electric Ecostruxure Machine Expert, Schneider-Electric Modicon M100 Firmware, Schneider-Electric Modicon M200 Firmware, Schneider-Electric Modicon M221 Firmware, Schneider-Electric Somachine Basic.

## How do I fix CVE-2020-7489?

No fix has been published for CVE-2020-7489 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7489 being exploited?

There is no known exploitation of CVE-2020-7489 in the wild and no public exploit code.

## Other vulnerabilities in SoMachine Basic (all versions)EcoStruxure Machine Expert – Basic (all versions)Modicon M100 Logic Controller (all versions)Modicon M200 Logic Controller (all versions)Modicon M221 Logic Controller (all versions)

- [CVE-2020-7487](https://insights.sbomify.com/CVE-2020-7487/): Code injection in EcoStruxure Machine Expert (all versions)SoMachine, SoMachine Motion (all versions)Modicon M218 Logic Controller (all versions)Modicon M241 Logic Controller (all versions)Modicon M251 Logic Controller (all versions)Modicon M258 Logic Controller (all versions) (critical 9.8)
- [CVE-2021-22704](https://insights.sbomify.com/CVE-2021-22704/): Path traversal in Harmony/HMI Products Configured by Vijeo Designer (all versions prior to V6.2 SP11 ), Vijeo Designer Basic (all versions prior to V1.2), or EcoStruxure Machine Expert (all versions prior to V2.0) (critical 9.1)
- [CVE-2021-22705](https://insights.sbomify.com/CVE-2021-22705/): Memory corruption in Harmony HMI Products Configured by Vijeo Designer (all versions prior to V6.2 SP11 ) or EcoStruxure Machine Expert (all versions prior to V2.0) (high 7.8)
- [CVE-2020-7488](https://insights.sbomify.com/CVE-2020-7488/): Information disclosure in EcoStruxure Machine Expert (all versions)SoMachine, SoMachine Motion (all versions)Modicon M218 Logic Controller (all versions)Modicon M241 Logic Controller (all versions)Modicon M251 Logic Controller (all versions)Modicon M258 Logic Controller (all versions) (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7489 and fix it if it is affected.

What it is: CVE-2020-7489 is a critical code injection vulnerability in SoMachine Basic (all versions)EcoStruxure Machine Expert – Basic (all versions)Modicon M100 Logic Controller (all versions)Modicon M200 Logic Controller (all versions)Modicon M221 Logic Controller (all versions), published on 22 Apr 2020. 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-2020-7489 in the wild and no public exploit code.

Affected product: SoMachine Basic (all versions)EcoStruxure Machine Expert – Basic (all versions)Modicon M100 Logic Controller (all versions)Modicon M200 Logic Controller (all versions)Modicon M221 Logic Controller (all versions). 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-2020-7489/ (Markdown: https://insights.sbomify.com/CVE-2020-7489/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7489
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7489
- OSV: https://osv.dev/vulnerability/CVE-2020-7489

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-7489/
Summaries are generated and may contain mistakes; the official description above is the record.