An issue was discovered in FIS GT.M through V7.0-000 (related to the YottaDB code base). Using crafted input, an attacker can cause calls to ZRead to crash due to a NULL pointer dereference.
https://sourceforge.net/projects/fis-gtm/files/
https://gitlab.com/YottaDB/DB/YDB/-/issues/828
http://tinco.pair.com/bhaskar/gtm/doc/articles/GTM_V7.0-002_Release_Notes.html