Red Lion Controls N-Tron 700 Series Authentication Bypass Using an Alternate Path or Channel
Summary
| CVE | CVE-2026-33272 |
|---|---|
| State | PUBLISHED |
| Assigner | icscert |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-09 15:17:14 UTC |
| Updated | 2026-10-09 15:17:14 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v4.0 6.8 MEDIUM from [email protected]
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
Problem Types: CWE-288 | CWE-288 CWE-288
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 6.8 | MEDIUM | 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/C... |
| 4.0 | CNA | CVSS | 6.8 | MEDIUM | 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 |
| 3.1 | [email protected] | Secondary | 4.9 | MEDIUM | CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N |
| 3.1 | CNA | CVSS | 4.9 | MEDIUM | CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N |
CVSS v4.0 Breakdown
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
CVSS v3.1 Breakdown
CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Lion Controls | 700 Series | affected Firmware Versions 3.11.0 custom | Not specified |
| CNA | Red Lion Controls | 700 Series | affected Bootloader Versions 2.0.6.1 custom | Not specified |
| CNA | Red Lion Controls | 700 Series | unaffected 3.11.1 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.hms-networks.com/cybersecurity | [email protected] | www.hms-networks.com | |
| www.hms-networks.com | [email protected] | www.hms-networks.com | |
| github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-28... | [email protected] | github.com | |
| www.cisa.gov/news-events/ics-advisories/icsa-26-281-01 | [email protected] | www.cisa.gov | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Gabrianna (Ria) Milloway of Idaho National Laboratory reported this vulnerability to CISA. (en)
Additional Advisory Data
Solutions
CNA: Red Lion controls recommends the following upgrades for the N-Tron 700 Series: * Upgrade to firmware version 3.11.1 or greater * Configure or disable the SNMP communities * Disable access to the web GUI The upgrade procedure document can be viewed here https://www.hms-networks.com/ . The advisory issued by HMS Networks regarding these vulnerabilities can be viewed here https://www.hms-networks.com/cybersecurity .