Moxa has released an updated firmware version (https://www.moxa.com/en/support/product-support/software-and-documentation/search?psid=50535) for the NPort IAW5000A-I/O Series and recommends (https://www.moxa.com/en/support/support/security-advisory/nport-iaw5000a-io-serial-device-servers-vulnerabilities) users install this update on all affected systems.
Configurations
Workarounds
Exploits
Credits
Evgeniy Druzhinin and Ilya Karpov of Rostelecom-Solar reported these vulnerabilities to CISA