“End of life, end of support, pandemic-induced shipping delays and remote work, scanning failures: It’s a recipe for a patching nightmare.”, federal cybersecurity CTO Matt Keller says. Ensuring a high level of security for your IT infrastructure and being sure you have not missed something is hard to arrange during these days. A zero-day exploit happens when hackers identify a software weakness or a security gap and take advantage of it to perform a cyberattack.