An Improper Authentication vulnerability in Korenix JetNet TFTP allows abuse of this service. This issue affects JetNet devices older than firmware version 2024/01.
https://www.beijerelectronics.com/en/support/Help___online?docId=69947
https://cyberdanube.com/en/en-multiple-vulnerabilities-in-korenix-jetnet-series/
http://seclists.org/fulldisclosure/2024/Jan/11
http://packetstormsecurity.com/files/176550/Korenix-JetNet-Series-Unauthenticated-Access.html