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How Zero-Day Detection Works: A Technical Overview

Fusionstek

Traditional security tools wait for a CVE to be published before they can tell you you're affected. That leaves a critical window—often 7 to 14 days—where exploits are already in the wild but your CVE-based dashboards show nothing.

Our approach

We fingerprint your attack surface once (tech stack + versions from web fingerprinting) and store it in a baseline snapshot. Then we don't re-scan your infrastructure every hour. Instead, we continuously check upstream sources:

  • GitHub Releases — Security releases and CVE mentions in release notes for the exact technologies you run.
  • Exploit-DB — New exploit entries that match your detected tech stack.

When a security release is newer than the version we detected on your asset, we raise a high-confidence alert. That's version-aware precision: we're not just matching product names, we're comparing semantic versions so you only get alerted when you're likely affected.

Why it matters

You get 3–7 days earlier visibility without running more scans or deploying agents. Zero infrastructure overhead, and alerts that are 100% relevant to what you actually run.