Medium severity · published Oct 9, 2026
CVE-2026-33272
Red Lion Controls N-Tron 700 Series Authentication Bypass Using an Alternate Path or Channel
4.9
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Attack vector
Physical
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
7S
700 Series · Red Lion Controls
before Firmware Versions 3.11.0; before Bootloader Versions 2.0.6.1 · source: vendor
In the news
VulnerabilityHigh
Red Lion Controls N-Tron 700 Series
View CSAF
Summary
Successful exploitation of these vulnerabilities could allow a malicious user to access the device and gain administrative access. This access would allow the user to view, edit, and upload configuration files. Further, a malicious user can cause the switch to reboot by navigating to a specific URL on the device. This action can be scripted on the malicious user's local machine to cause continuous rebooting of the switch.
The following versions of Red Lion Controls N-Tron 700 Series are affected:
700 Series <=Firmware_3.11.0 (CVE-2026-32645, CVE-2026-39460, CVE-2026-28745, CVE-2026-33367, CVE-2026-29797, CVE-2026-39453, CVE-2026-33272)
700 Series <=Bootloader_2.0.6.1 (CVE-2026-32645, CVE-2026-39460, CVE-2026-28745, CVE-2026-33367, CVE-2026-29797, CVE-2026-39453, CVE-2026-33272)
CVSS
Vendor
Equipment
v3 8.3
Red Lion Controls
700 Series
7 Vulnerabilities
Use of Hard-coded Credentials, Insufficiently Protected Credentials, Storing Passwords in a Recoverable Format, Missing Authentication for Critical Function, Download of Code Without Integrity Check, Reachable Assertion, Authentication Bypass Using an Alternate Path or Channel
Background
Critical Infrastructure Sectors: Commercial Facilities, Communications, Critical Manufacturing, Information Technology
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Sweden
Vulnerabilities
Expand All...
Oct 8, 2026·CISA Advisories
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33272
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33272
www.hms-networks.com
https://www.hms-networks.com/
www.hms-networks.com
https://www.hms-networks.com/cybersecurity
www.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
More from 700 Series
8.3
CVE-2026-39453
Red Lion Controls N-Tron 700 Series Reachable Assertion
8.1
CVE-2026-33367
Red Lion Controls N-Tron 700 Series Missing Authentication for Critical Function
8.1
CVE-2026-39460
Red Lion Controls N-Tron 700 Series Insufficiently Protected Credentials
7.5
CVE-2026-28745
Red Lion Controls N-Tron 700 Series Storing Passwords in a Recoverable Format
7.1
CVE-2026-29797
Red Lion Controls N-Tron 700 Series Download of Code Without Integrity Check
