More than half of the most impactful vulnerabilities started with a zero-day exploit, a new study shows. 60% of the widespread vulnerability threats have been deployed in ransomware attacks, the report says. The industry is seeing more of these attacks because there’s more visibility and sharing of that information. The report says the average time to known exploitation accelerated to 12 days in 2021 from 42 days in 2020 in the wild. “There’s consensus that zero day attacks hit an all-time high in 2021,” says vulnerability research manager.”]