Red Lion Controls N-Tron 700 Series Authentication Bypass Using an Alternate Path or Channel

published 2026-10-09 30 d ago modified 2026-10-11 28 d ago also EUVD-2026-95815

cvss: 4.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 4%
public exploits: 0; none known

A malicious user with physical access to the device can boot the switch from factory settings without authentication, use the default administrative credentials to obtain administrative access, and save changes to the configuration file so that they persist next time the switch boots normally.

Patch / fix

fixed in 1

Red Lion Controls 700 Series 3.11.1, Bootloader Versions 2.0.6.1, Firmware Versions 3.11.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-281-01 updated 2026-10-15 cvss 4.9

Red Lion Controls N-Tron 700 Series - Update A

Red Lion Controls 700 Series <=Firmware_3.11.0, <=Bootloader_2.0.6.1
affected: vendor fix, mitigation “The upgrade procedure document can be found at https://www.hms-networks.com/.” hms-networks.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 28 d ago (2026-10-11)

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.9	CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
CNA	4.0	6.8	CVSS:4.0/AV:P/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N
CNA	4.0	6.8	CVSS:4.0/AV:P/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

Red Lion Controls 700 Series

Classification

Weakness

CWE-288 Authentication Bypass Using an Alternate Path or Channel

References

Sources

CVE List CVE-2026-33272
NVD CVE-2026-33272

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary