CVE-2026-33367

HIGH 8.1

Red Lion Controls N-Tron 700 Series Missing Authentication for Critical Function

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	red lion controls
Product	700 series
Published	Oct 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

Red Lion Controls / 700 Series

0 < Firmware Versions 3.11.0 0 < Bootloader Versions 2.0.6.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Gabrianna (Ria) Milloway of Idaho National Laboratory reported this vulnerability to CISA.