Other
Zero-day (0-day)
ActiveUpdated: 22 September 2026Published
Key
innovation
The attack window that exists before any defense or patch is available.
Category
Other
Abstraction level
Primitive
Operation level
System
Use cases
Offensive/defensive cybersecurityAPT operationsVulnerability research
How it works
An attacker finds and exploits a flaw unknown to the vendor; the exploit works until it is detected and patched.
Problem solved
An unknown vulnerability without an available patch lets attackers strike before defenders can respond.