# CVE-2025-40594: Privilege escalation in SINAMICS G220 V6.4

> An unauthorized attacker can escalate privileges and perform factory resets on Siemens SINAMICS drives due to improper privilege management and leaked session privileges.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L`)
- **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:** 9 Sep 2025
- **Updated:** 10 Mar 2026
- **Also known as:** GHSA-jg6x-p73x-m4hc

## What is CVE-2025-40594?

CVE-2025-40594 is a medium-severity vulnerability in Siemens SINAMICS G220 V6.4, published on 9 Sep 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 SINAMICS G220 V6.4 (All versions < V6.4 HF2), SINAMICS S200 V6.4 (All versions < V6.4 HF7), SINAMICS S210 V6.4 (All versions < V6.4 HF2). The affected devices allow a factory reset to be executed without the required privileges due to improper privilege management as well as manipulation of configuration data because of leaked privileges of previous sessions. This could allow an unauthorized attacker to escalate their privileges.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2025-40594?

It affects 3 products.


Products: Siemens Sinamics G220 Firmware, Siemens Sinamics S200 Firmware, Siemens Sinamics S210 Firmware.

## How do I fix CVE-2025-40594?

No fix has been published for CVE-2025-40594 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-40594 being exploited?

There is no known exploitation of CVE-2025-40594 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-40594 and fix it if it is affected.

What it is: CVE-2025-40594 is a medium-severity vulnerability in Siemens SINAMICS G220 V6.4, published on 9 Sep 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-2025-40594 in the wild and no public exploit code.

Affected product: Siemens SINAMICS G220 V6.4. 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-2025-40594/ (Markdown: https://insights.sbomify.com/CVE-2025-40594/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-40594
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-40594
- OSV: https://osv.dev/vulnerability/CVE-2025-40594

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-40594/
Summaries are generated and may contain mistakes; the official description above is the record.