CVE-2026-41020 Eaton easyE4 uses a static nonce during authentication, which could allow an unauthenticated attacker with access to captured authentication
High 7.5
Published
Updated
Check this codebase for CVE-2026-41020 and fix it if it is affected.
What it is: CVE-2026-41020 is a high-severity vulnerability in Eaton easyE4, published on 27 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-41020 in the wild and no public exploit code.
Affected product: Eaton easyE4. 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-2026-41020/ (Markdown: https://insights.sbomify.com/CVE-2026-41020/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-41020?
CVE-2026-41020 is a high-severity vulnerability in Eaton easyE4, published on 27 Oct 2026.
Official description
Eaton easyE4 uses a static nonce during authentication, which could allow an unauthenticated attacker with access to captured authentication traffic to replay a valid authentication exchange and gain unauthorized access to the device.
Weakness: CWE-294
Which versions are affected by CVE-2026-41020?
How do I fix CVE-2026-41020?
No fix has been published for CVE-2026-41020 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-41020 being exploited?
There is no known exploitation of CVE-2026-41020 in the wild and no public exploit code.
Sources
Also known as GHSA-4r7w-hmfv-2648.