A key objective of NYDFS Regulation Part 500 is to permit the agency to share information it receives from its 72-hour notification provision with all regulated entities. This can help protect all entities from a cyber threat identified initially at some entities; NYDFS regulates over 3500 entities with approximately $7 trillion in assets. This recent NYDFS guidance from February 16, 2021 shows the regulation at work.
The guidance may be found here: https://www.dfs.ny.gov/industry_guidance/industry_letters/il20210216_cyber_fraud_alert