Firmware Update Vulnerability in N-Tron Devices by HMS Networks
CVE-2026-29797

8.4HIGH

Key Information:

Vendor

Red Lion Controls

Status
700 Series
Vendor
CVE Published:
9 October 2026

What is CVE-2026-29797?

The vulnerability in N-Tron devices allows unauthorized firmware and bootloader updates without requiring authentication. This critical flaw enables attackers with the same software to easily scan networks for N-Tron devices, potentially allowing them to modify or extract firmware via SNMP/TFTP protocols. Such security oversights raise significant concerns for device integrity and network safety, emphasizing the need for immediate attention and remediation.

Affected Version(s)

700 Series 0

700 Series 0

700 Series 3.11.1

References

https://www.hms-networks.com/
https://www.hms-networks.com/cybersecurity
https://www.cisa.gov/news-events/ics-advisories/icsa-26-2...

CVSS V4

Score:
8.4
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Gabrianna (Ria) Milloway of Idaho National Laboratory reported this vulnerability to CISA.
.