# CVE-2025-40584: XML external entity in SIMOTION SCOUT TIA V5.4

> An attacker can read arbitrary files on the system by exploiting an XML External Entity injection vulnerability in Siemens engineering software.

- **Severity:** Medium 6.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Aug 2025
- **Updated:** 14 Oct 2025
- **Also known as:** GHSA-f2j7-8mgp-4g8f

## What is CVE-2025-40584?

CVE-2025-40584 is a medium-severity vulnerability in Siemens SIMOTION SCOUT TIA V5.4, published on 12 Aug 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A vulnerability has been identified in SIMOTION SCOUT TIA V5.4 (All versions), SIMOTION SCOUT TIA V5.5 (All versions), SIMOTION SCOUT TIA V5.6 (All versions < V5.6 SP1 HF7), SIMOTION SCOUT TIA V5.7 (All versions < V5.7 SP1 HF1), SIMOTION SCOUT V5.4 (All versions), SIMOTION SCOUT V5.5 (All versions), SIMOTION SCOUT V5.6 (All versions < V5.6 SP1 HF7), SIMOTION SCOUT V5.7 (All versions < V5.7 SP1 HF1), SINAMICS STARTER V5.5 (All versions), SINAMICS STARTER V5.6 (All versions), SINAMICS STARTER V5.7 (All versions < V5.7 HF2). The affected application contains a XML External Entity Injection (XXE) vulnerability while parsing specially crafted XML files. This could allow an attacker to read arbitrary files in the system.

Weakness: CWE-611 (Improper Restriction of XML External Entity Reference)

## Which versions are affected by CVE-2025-40584?


## How do I fix CVE-2025-40584?

No fix has been published for CVE-2025-40584 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-40584 being exploited?

There is no known exploitation of CVE-2025-40584 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-40584 and fix it if it is affected.

What it is: CVE-2025-40584 is a medium-severity vulnerability in Siemens SIMOTION SCOUT TIA V5.4, published on 12 Aug 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-40584 in the wild and no public exploit code.

Affected product: Siemens SIMOTION SCOUT TIA V5.4. 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-2025-40584/ (Markdown: https://insights.sbomify.com/CVE-2025-40584/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-40584
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-40584
- OSV: https://osv.dev/vulnerability/CVE-2025-40584

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-40584/
Summaries are generated and may contain mistakes; the official description above is the record.