Zero-day attack
nounid
4704·updated May 9, 2026verified
An attack on a piece of software that has a vulnerability for which there is no known patch.
MWE
Attested in
No recorded attestations. They are written when an MWE tagging stage is completed, stamped with the pack version and the document’s digest.
Classifications
Entity Type
Vulnerability95%rule-basedr:entity.vulnerability.cve.v1
Sensitivity
unclassified
Information Class
unclassified
Variants
- plural
- Zero-day attacks
- possessive
- Zero-day attack's
- pluralpossessive
- Zero-day attacks'
Framework definitions
- §1
- A zero-day (or zero-hour or day zero) attack or threat is a computer threat that tries to exploit computer application vulnerabilities that are unknown to others or undisclosed to the software developer. Zero-day exploits (actual code that can use a security hole to carry out an attack) are used or shared by attackers before the software developer knows about the vulnerability.
Federal Financial Institutions Examination Council (FFIEC) IT Examination Handbook Infobase, Glossary1 senseview framework →
- §1
- An attack on a piece of software that has a vulnerability for which there is no known patch.
- §1 · legacy_primary
- An attack on a piece of software that has a vulnerability for which there is no known patch.DR-088 backfill from the noun definition column
Outgoing relationships
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Incoming relationships
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