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CVE-2025-41702— egOS WebGUI Hard-Coded JWT Secret Enables Authentication Bypass

Quick assessment

Affected
Welotec EG400Mk2-D11001-000101
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.

Welotec EG400Mk2 series和Welotec EG500Mk2 series都是德国Welotec公司的一系列边缘IoT计算网关。 Welotec多款产品存在安全漏洞，该漏洞源于JWT密钥硬编码在egOS WebGUI后端，可能导致绕过身份验证和授权。以下产品受到影响：EG400Mk2-D11001-000101、EG503W、EG503L、EG503W_4GB等。

CVSS 9.8 · Critical EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-41702

Vulnerability Information
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Vulnerability Title
egOS WebGUI Hard-Coded JWT Secret Enables Authentication Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
The JWT secret key is embedded in the egOS WebGUI backend and is readable to the default user. An unauthenticated remote attacker can generate valid HS256 tokens and bypass authentication/authorization due to the use of hard-coded cryptographic key.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的密码学密钥
Source: CVE Program / CVE List V5
Vulnerability Title
Welotec多款产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Welotec EG400Mk2 series和Welotec EG500Mk2 series都是德国Welotec公司的一系列边缘IoT计算网关。 Welotec多款产品存在安全漏洞，该漏洞源于JWT密钥硬编码在egOS WebGUI后端，可能导致绕过身份验证和授权。以下产品受到影响：EG400Mk2-D11001-000101、EG503W、EG503L、EG503W_4GB等。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Welotec EG400Mk2-D11001-000101 0.0.0 ~ v1.7.7 -
Welotec EG400Mk2-D11101-000101 0.0.0 ~ v1.7.7 -
Welotec EG503W 0.0.0 ~ v1.7.7 -
Welotec EG503L 0.0.0 ~ v1.7.7 -
Welotec EG503W_4GB 0.0.0 ~ v1.7.7 -
Welotec EG503L_4GB 0.0.0 ~ v1.7.7 -
Welotec EG503L-G 0.0.0 ~ v1.7.7 -
Welotec EG500Mk2-A11101-000101 0.0.0 ~ v1.7.7 -
Welotec EG500Mk2-A11001-000101 0.0.0 ~ v1.7.7 -
Welotec EG500Mk2-B11101-000101 0.0.0 ~ <v1.7.7 -
Welotec EG500Mk2-B11001-000101 0.0.0 ~ <v1.7.7 -
Welotec EG500Mk2-C11101-000101 0.0.0 ~ <v1.7.7 -
Welotec EG500Mk2-C11001-000101 0.0.0 ~ <v1.7.7 -
Welotec EG500Mk2-A12011-000101 0.0.0 ~ <v1.7.7 -
Welotec EG500Mk2-A11001-000201 0.0.0 ~ <v1.7.7 -
Welotec EG500Mk2-A21101-000101 0.0.0 ~ <v1.7.7 -
Welotec EG602W 0.0.0 ~ <v1.7.7 -
Welotec EG602L 0.0.0 ~ <v1.7.7 -
Welotec EG603W Mk2 0.0.0 ~ <v1.7.7 -
Welotec EG603L Mk2 0.0.0 ~ <v1.7.7 -
Welotec EG802W 0.0.0 ~ <v1.7.7 -
Welotec EG804W 0.0.0 ~ <v1.7.7 -
Welotec EG802W_i7_512GB_DinRail 0.0.0 ~ <v1.7.7 -
Welotec EG802W_i7_512GB_w/o DinRail 0.0.0 ~ <v1.7.7 -
Welotec EG804W Pro 0.0.0 ~ <v1.7.7 -

II. Public POCs for CVE-2025-41702

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III. Intelligence Information for CVE-2025-41702

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Vendor Advisories for CVE-2025-41702 (1)

IV. Related Vulnerabilities

Same vendor: Welotec
Same weakness: CWE-321

V. Comments for CVE-2025-41702

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