CVE-2026-39453

Red Lion Controls N-Tron 700 Series Reachable Assertion

State: Published
Severity: 8.5 High
Published: Oct 9, 2026
Updated: Oct 11, 2026
Reserved: Apr 8, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.5 High	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	icscert
3.1	8.3 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H	icscert

Weaknesses

CWE-617

Affected Products

Product	Versions
700 SeriesRed Lion Controls	before Firmware Versions 3.11.0Affected before Bootloader Versions 2.0.6.1Affected 3.11.1Not affected

References

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

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