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CVE-2026-41020

Quick assessment

Affected
Eaton easyE4
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

伊顿（Eaton）easyE4 设备在身份验证过程中使用静态随机数（nonce），这可能导致未认证的攻击者通过截获身份验证流量，重放有效的身份验证交互，从而未经授权访问该设备。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-41020

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用捕获-重放进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eaton easyE4 0 ~ 2.46 -

II. Public POCs for CVE-2026-41020

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III. Intelligence Information for CVE-2026-41020

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Other References for CVE-2026-41020 (1)

Same Patch Batch · Eaton · 2026-10-27 · 3 CVEs total

CVE-2026-41021 7.5 HIGH Eaton easyE4 弱密码策略漏洞
CVE-2026-41022 5.9 MEDIUM Eaton easySoft TLS 证书验证缺失致中间人攻击

IV. Related Vulnerabilities

Same product: easyE4
Same vendor: Eaton
Same weakness: CWE-294