https://www.bleepingcomputer.com/news/security/google-70-percent-of-exploited-flaws-disclosed-in-2023-were-zero-days/

Google Mandiant security analysts warn of a worrying new trend of threat actors demonstrating a better capability to discover and exploit zero-day vulnerabilities in software.

Specifically, of the 138 vulnerabilities disclosed as actively exploited in 2023, Mandiant says 97 (70.3%) were leveraged as zero-days.