What is CVE-2026-41020?

CVE-2026-41020 is a high-severity vulnerability in Eaton Easye4, classified under Authentication Bypass by Capture-replay. CVSS score: 7.5/10. Published 2026-10-27.

How severe is CVE-2026-41020?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Eaton Easye4

CVE-2026-41020

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.

Published 2026-10-27 · last modified 2026-10-27.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Eaton Easye4

Weakness classification (CWE)

CWE-294 — Authentication Bypass by Capture-replay

References

www.eaton.com/content/dam/eaton/company/news-insights/cybersecurity/security-bu… (vendor-advisory)

Frequently asked questions

What is CVE-2026-41020?: CVE-2026-41020 is a high-severity vulnerability in Eaton Easye4, classified under Authentication Bypass by Capture-replay. CVSS score: 7.5/10. Published 2026-10-27.
How severe is CVE-2026-41020?: High severity. CVSS v3 base score is 7.5 out of 10.