A vulnerability exists in the stb-language file handling that affects the RTU500 series product versions listed below. A malicious actor could enforce diagnostic texts being displayed as empty strings, if an authorized user uploads a specially crafted stb-language file.
https://www.cisa.gov/news-events/ics-advisories/icsa-24-116-01
https://publisher.hitachienergy.com/preview?DocumentId=8DBD000190&languageCode=en&Preview=true