Source : Webster's Revised Unabridged Dictionary (1913)

Vulnerability \Vul`ner*a*bil"i*ty\, n.
   The quality or state of being vulnerable; vulnerableness.

Source : WordNet®

vulnerability
     n 1: the state of being vulnerable or exposed; "his vulnerability
          to litigation"; "his exposure to ridicule" [syn: {exposure}]
     2: susceptibility to injury or attack [ant: {invulnerability}]