Zero Day
nounid
4703·updated May 9, 2026verified
The "Day Zero" or "Zero Day" is the day a new vulnerability is made known. In some cases, a "zero day" exploit is referred to an exploit for which no patch is available yet. ("day one" - day at which the patch is made available).
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 Days
- possessive
- Zero Day's
- pluralpossessive
- Zero Days'
Framework definitions
- §1
- The "Day Zero" or "Zero Day" is the day a new vulnerability is made known. In some cases, a "zero day" exploit is referred to an exploit for which no patch is available yet. ("day one" - day at which the patch is made available).
- §1 · legacy_primary
- The "Day Zero" or "Zero Day" is the day a new vulnerability is made known. In some cases, a "zero day" exploit is referred to an exploit for which no patch is available yet. ("day one" - day at which the patch is made available).DR-088 backfill from the noun definition column
Outgoing relationships
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Incoming relationships
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