A denial-of-service vulnerability exists in the Rockwell Automation affected products when specially crafted packets are sent to the CIP Security Object. If exploited the device will become unavailable and require a factory reset to recover.
https://www.cisa.gov/news-events/ics-advisories/icsa-24-256-18
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1963.html