CVE-2026-41020 Eaton easyE4 - Authentication Bypass

Eaton easyE4 contains an authentication bypass caused by use of a static nonce during authentication, letting unauthenticated attackers replay captured authentication traffic to gain unauthorized access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.23% chance of exploitation in 30 days
View the NVD record ↗

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-294

Vendor fix

Update to the latest version with improved authentication mechanisms.

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

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