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Zero‑Day Vulnerability
Threats
Unpatched vulnerability exploited before vendor remediation.
Definition
A zero-day vulnerability is a flaw exploited in the wild before a patch or mitigation is widely available, often used in targeted campaigns.
In plain English
Unpatched vulnerability exploited before vendor remediation.
Why this matters
Why it matters: It increases risk of stealth compromise and privacy violations, especially on endpoints.
Example
Example: Active exploitation of a browser zero-day for drive-by compromise.