Zero Day Clock

Meet Zero Day Clock

Zero Day Clock is a public cybersecurity observatory that brings together vulnerability disclosures, known exploited vulnerability catalogues, and observed internet scanning activity. Its interactive dashboards show how these records change over time, compare technology domains, and explore the relationship between public disclosure and recorded exploitation. Sources include the CVE Program, NVD, CISA KEV, and honeypot telemetry.

Security teams, researchers, journalists, and decision-makers can use the site to examine trends, look up vulnerabilities in the Explorer, and compare patch-prioritization approaches. Charts include source attribution and explanations of how measurements are calculated. The project emphasizes the limits of public data, distinguishing catalogue entries and scanning attempts from confirmed compromises. The observatory is freely accessible without an account.