---
title: "CVE-2026-41021: Eaton easyE4 - Authentication Bypass"
description: "Eaton easyE4 contains a broken authentication caused by insufficiently strong password policy, letting attackers with password hashes perform offline password-guessing attacks, exploit requires attacker to have password hashes."
url: https://panop.io/threat-heartbeat/CVE-2026-41021/
---

# CVE-2026-41021 Eaton easyE4 - Authentication Bypass

Eaton easyE4 contains a broken authentication caused by insufficiently strong password policy, letting attackers with password hashes perform offline password-guessing attacks, exploit requires attacker to have password hashes.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.18% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-41021)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

27 October 2026

Updated

29 October 2026

Weakness

[CWE-521](https://cwe.mitre.org/data/definitions/521.html)

## Vendor fix

Implement a stronger password policy and protect password hashes; update to latest version if available.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-41021](https://nvd.nist.gov/vuln/detail/CVE-2026-41021)
- [https://www.eaton.com/content/dam/eaton/company/news-insights/cybersecurity/security-bulletins/eaton-va-2026-1017.pdf](https://www.eaton.com/content/dam/eaton/company/news-insights/cybersecurity/security-bulletins/eaton-va-2026-1017.pdf)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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