Google's Threat Analysis Group and Mandiant have confirmed that there were 97 zero-day vulnerabilities observed in the wild in the past year, marking a 50% increase compared to the previous year. Out of these, 29 were discovered by Google's security researchers. The People's Republic of China was identified as responsible for exploiting 12 zero-day vulnerabilities in 2023, up from seven in 2022.
Zero-day vulnerabilities are those discovered by threat actors before the vendor becomes aware of them. Google's dedicated Threat Analysis Group, comprising skilled security researchers, focuses on countering government-backed hacking and attacks, with a significant emphasis on zero-day discoveries.