CVE-2025-41702

egOS WebGUI Hard-Coded JWT Secret Enables Authentication Bypass

Critical9.8EPSS 0.52%

Published: 26 Aug 2025
Updated: 26 Aug 2025
Reserved: 16 Apr 2025
Assigned by: CERTVDE

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.

Scores

CVSS scores of CVE-2025-41702, by who scored it
Scored by	CVSS	Score	Vector
CERTVDECNA (assigner)	3.1	Critical9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Deferred	3.1	Critical9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (exploitation in 30 days): 0.52% · top 56% of all CVEs (5 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: yes · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

CWE-321 Use of Hard-coded Cryptographic Key (opens in a new tab)All about CWE-321 and its CVEs

Affected products

Welotec · EG400Mk2-D11001-000101
- affected 0.0.0 – < v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG400Mk2-D11101-000101
- affected 0.0.0 – < v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG503W
- affected 0.0.0 – < v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG503L
- affected 0.0.0 – < v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG503W_4GB
- affected 0.0.0 – < v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG503L_4GB
- affected 0.0.0 – < v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG503L-G
- affected 0.0.0 – < v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG500Mk2-A11101-000101
- affected 0.0.0 – < v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG500Mk2-A11001-000101
- affected 0.0.0 – < v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG500Mk2-B11101-000101
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG500Mk2-B11001-000101
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG500Mk2-C11101-000101
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG500Mk2-C11001-000101
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG500Mk2-A12011-000101
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG500Mk2-A11001-000201
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG500Mk2-A21101-000101
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG602W
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG602L
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG603W Mk2
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG603L Mk2
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG802W
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG804W
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG802W_i7_512GB_DinRail
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG802W_i7_512GB_w/o DinRail
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2
Welotec · EG804W Pro
- affected 0.0.0 – < <v1.7.7
- affected v1.8.0 – < v1.8.2

References (1)

https://certvde.com/de/advisories/VDE-2025-076 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2025-41702](https://trackcve.app/badge/CVE-2025-41702.svg)](https://trackcve.app/cve/CVE-2025-41702)

Record last updated 26 Aug 2025, 19:39 UTC.