# egOS WebGUI Hard-Coded JWT Secret Enables Authentication Bypass

CVE record · `CVE-2025-41702`

- **Identifiers:** `CVE-2025-41702`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** CERTVDE
- **Weakness (CWE):** [CWE-321](https://cwe.mitre.org/data/definitions/321.html)
- **Tags:** [Hard-coded credentials](https://agentprime.io/advisories/tag/hard-coded-credentials.md)
- **Technologies:** [Welotec EG400Mk2-D11001-000101](https://agentprime.io/advisories/technology/welotec-eg400mk2-d11001-000101.md) · [Welotec EG400Mk2-D11101-000101](https://agentprime.io/advisories/technology/welotec-eg400mk2-d11101-000101.md) · [Welotec EG503W](https://agentprime.io/advisories/technology/welotec-eg503w.md) · [Welotec EG503L](https://agentprime.io/advisories/technology/welotec-eg503l.md) · [Welotec EG503W_4GB](https://agentprime.io/advisories/technology/welotec-eg503w-4gb.md) · [Welotec EG503L_4GB](https://agentprime.io/advisories/technology/welotec-eg503l-4gb.md) · [Welotec EG503L-G](https://agentprime.io/advisories/technology/welotec-eg503l-g.md) · [Welotec EG500Mk2-A11101-000101](https://agentprime.io/advisories/technology/welotec-eg500mk2-a11101-000101.md) · [Welotec EG500Mk2-A11001-000101](https://agentprime.io/advisories/technology/welotec-eg500mk2-a11001-000101.md) · [Welotec EG500Mk2-B11101-000101](https://agentprime.io/advisories/technology/welotec-eg500mk2-b11101-000101.md) · [Welotec EG500Mk2-B11001-000101](https://agentprime.io/advisories/technology/welotec-eg500mk2-b11001-000101.md) · [Welotec EG500Mk2-C11101-000101](https://agentprime.io/advisories/technology/welotec-eg500mk2-c11101-000101.md) · [Welotec EG500Mk2-C11001-000101](https://agentprime.io/advisories/technology/welotec-eg500mk2-c11001-000101.md) · [Welotec EG500Mk2-A12011-000101](https://agentprime.io/advisories/technology/welotec-eg500mk2-a12011-000101.md) · [Welotec EG500Mk2-A11001-000201](https://agentprime.io/advisories/technology/welotec-eg500mk2-a11001-000201.md) · [Welotec EG500Mk2-A21101-000101](https://agentprime.io/advisories/technology/welotec-eg500mk2-a21101-000101.md) · [Welotec EG602W](https://agentprime.io/advisories/technology/welotec-eg602w.md) · [Welotec EG602L](https://agentprime.io/advisories/technology/welotec-eg602l.md) · [Welotec EG603W Mk2](https://agentprime.io/advisories/technology/welotec-eg603w-mk2.md) · [Welotec EG603L Mk2](https://agentprime.io/advisories/technology/welotec-eg603l-mk2.md)
- **Published:** 26 Aug 2025
- **Updated:** 26 Aug 2025
- **Reviewed by a person:** No

Published by the CVE Program (CNA: CERTVDE) at 26 Aug 2025, 06:10 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Welotec. Product: EG400Mk2-D11001-000101.
  - affected: `0.0.0 to before v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG400Mk2-D11101-000101.
  - affected: `0.0.0 to before v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG503W.
  - affected: `0.0.0 to before v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG503L.
  - affected: `0.0.0 to before v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG503W_4GB.
  - affected: `0.0.0 to before v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG503L_4GB.
  - affected: `0.0.0 to before v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG503L-G.
  - affected: `0.0.0 to before v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG500Mk2-A11101-000101.
  - affected: `0.0.0 to before v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG500Mk2-A11001-000101.
  - affected: `0.0.0 to before v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG500Mk2-B11101-000101.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG500Mk2-B11001-000101.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG500Mk2-C11101-000101.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG500Mk2-C11001-000101.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG500Mk2-A12011-000101.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG500Mk2-A11001-000201.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG500Mk2-A21101-000101.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG602W.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG602L.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG603W Mk2.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG603L Mk2.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG802W.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG804W.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG802W_i7_512GB_DinRail.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG802W_i7_512GB_w/o DinRail.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected
- Vendor: Welotec. Product: EG804W Pro.
  - affected: `0.0.0 to before <v1.7.7` (semver)
  - affected: `v1.8.0 to before v1.8.2` (semver)
  - Other versions: unaffected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 9.8 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (CERTVDE)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0052, the 44th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 26 Aug 2025. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2025-41702](https://www.cve.org/CVERecord?id=CVE-2025-41702)
- [NVD: CVE-2025-41702](https://nvd.nist.gov/vuln/detail/CVE-2025-41702)

### References from the CNA

- <https://certvde.com/de/advisories/VDE-2025-076>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2025-41702>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2025-41702/>. Everything for agents: <https://agentprime.io/llms.txt>.