零日

língrì
zero-day (attack, vulnerability etc) (computing)

CEDICT

computing

Entry Composition

1 零 líng
  1. zero
  2. nought
  3. zero sign
  4. fractional
  5. fragmentary
  6. odd (of numbers)
  7. (placed between two numbers to indicate a smaller quantity followed by a larger one)
  8. fraction
  9. (in mathematics) remainder (after division)
  10. extra
  11. to wither and fall
  12. to wither
2 日 rì
  1. sun
  2. day
  3. date, day of the month