CVE-2026-39453

Red Lion Controls N-Tron 700 Series Reachable Assertion

Published Oct 9, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Description
Navigating to a certain URL on the switch’s web server causes the switch to reboot. This can be automated using a tool like curl to create DoS conditions where the switch constantly reboots.

Remediation

Vendor Solution

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 .

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Red Lion Controls
Red Lion Controls 700 Series
Vendors & Products Red Lion Controls
Red Lion Controls 700 Series
Type Values Removed Values Added
Description Navigating to a certain URL on the switch’s web server causes the switch to reboot. This can be automated using a tool like curl to create DoS conditions where the switch constantly reboots.
Title Red Lion Controls N-Tron 700 Series Reachable Assertion
Weaknesses CWE-617
References
Metrics cvssV3_1

{'score': 8.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H'}

cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Oct 11, 2026, 5:05 PM
Reserved
Apr 8, 2026, 7:28 PM
Status
Awaiting Analysis
Published
Oct 9, 2026, 3:17 PM
Modified
Oct 11, 2026, 5:17 PM