Welotec EG400Mk2-D11001-000101 up to 1.7.6/1.8.1 hard-coded key

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability categorized as very critical has been discovered in Welotec EG400Mk2-D11001-000101, EG400Mk2-D11101-000101, EG503W, EG503L, EG503W_4GB, EG503L_4GB, EG503L-G, EG500Mk2-A11101-000101, EG500Mk2-A11001-000101, EG500Mk2-B11101-000101, EG500Mk2-B11001-000101, EG500Mk2-C11101-000101, EG500Mk2-C11001-000101, EG500Mk2-A12011-000101, EG500Mk2-A11001-000201, EG500Mk2-A21101-000101, EG602W, EG602L, EG603W Mk2, EG603L Mk2, EG802W, EG804W, EG802W_i7_512GB_DinRail, EG802W_i7_512GB_w, o DinRail and EG804W Pro up to 1.7.6/1.8.1. Impacted is an unknown function. Such manipulation leads to hard-coded key. This vulnerability is uniquely identified as CVE-2025-41702. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Welotec EG400Mk2-D11001-000101, EG400Mk2-D11101-000101, EG503W, EG503L, EG503W_4GB, EG503L_4GB, EG503L-G, EG500Mk2-A11101-000101, EG500Mk2-A11001-000101, EG500Mk2-B11101-000101, EG500Mk2-B11001-000101, EG500Mk2-C11101-000101, EG500Mk2-C11001-000101, EG500Mk2-A12011-000101, EG500Mk2-A11001-000201, EG500Mk2-A21101-000101, EG602W, EG602L, EG603W Mk2, EG603L Mk2, EG802W, EG804W, EG802W_i7_512GB_DinRail, EG802W_i7_512GB_w, o DinRail and EG804W Pro up to 1.7.6/1.8.1. Affected by this issue is an unknown functionality. The manipulation with an unknown input leads to a hard-coded key vulnerability. Using CWE to declare the problem leads to CWE-321. The use of a hard-coded cryptographic key significantly increases the possibility that encrypted data may be recovered. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at certvde.com. This vulnerability is handled as CVE-2025-41702 since 04/16/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/26/2025). The MITRE ATT&CK project declares the attack technique as T1600.001.

Upgrading to version 1.7.7 or 1.8.2 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (CERTVDE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Hard-coded key
CWE: CWE-321 / CWE-320
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: EG400Mk2-D11001-000101/EG400Mk2-D11101-000101/EG503W/EG503L/EG503W_4GB/EG503L_4GB/EG503L-G/EG500Mk2-A11101-000101/EG500Mk2-A11001-000101/EG500Mk2-B11101-000101/EG500Mk2-B11001-000101/EG500Mk2-C11101-000101/EG500Mk2-C11001-000101/EG500Mk2-A12011-000101/EG500Mk2-A11001-000201/EG500Mk2-A21101-000101/EG602W/EG602L/EG603W Mk2/EG603L Mk2/EG802W/EG804W/EG802W_i7_512GB_DinRail/EG802W_i7_512GB_w/o DinRail/EG804W Pro 1.7.7/1.8.2

Timelineinfo

04/16/2025 CVE reserved
08/26/2025 +132 days Advisory disclosed
08/26/2025 +0 days VulDB entry created
08/26/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: VDE-2025-076
Status: Confirmed

CVE: CVE-2025-41702 (🔒)
GCVE (CVE): GCVE-0-2025-41702
GCVE (VulDB): GCVE-100-321392

Entryinfo

Created: 08/26/2025 09:21
Updated: 08/26/2025 14:25
Changes: 08/26/2025 09:21 (63), 08/26/2025 14:25 (1)
Complete: 🔍
Cache ID: 216::103

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