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Last reviewed and updated | October 20, 2026

Zero-day vulnerability

A vulnerability that is exploited or disclosed before a fix is available.

Glossary

Compliance
Control
Continuous controls monitoring (CCM)
Control effectiveness
Control coverage
Control mapping
Control gap
Finding
Traceability
Continuous assurance
Point-in-time audit
Compliance drift
Governance, risk and compliance (GRC)
Compliance
Cybersecurity
Frontier AI
AI-accelerated threat
Exposure management
Continuous threat exposure management (CTEM)
CVSS
Exposure scoring with business context
Asset criticality
Application owner attribution
Remediation validation
Zero-day vulnerability
AI governance
Risk prioritization
Exposure
CVE
Data Management
Entity resolution
Data lineage
Identity and Access
User access review (UAR)
Access certification
Entitlement
Identity governance and administration (IGA)
Disconnected application
Mainframe access review
Reviewer rubber-stamping
Joiner, mover, leaver
Access removal time
Non-human identity
Security Data Fabric
Security data fabric
Open Cybersecurity Schema Framework (OCSF)
Data federation

Why it matters

With no patch, response depends on knowing what is exposed and who owns it.

How it works

  1. Identify affected assets.
  2. Find owners.
  3. Apply mitigations.
  4. Patch when available.
  5. Validate.