unguarded

adjectives

lacking protection or a guard
"an unguarded gate"; "his unguarded queen was open to attack"
unguarded
is similar to
susceptible to attack
"a vulnerable bridge"
vulnerable
displaying or feeling no wariness
"an unguarded remark"
unguarded
is similar to
not alert to danger or deception
"the shrieks of unwary animals taken by surprise"; "some thieves prey especially on unwary travelers"; "seduce the unwary reader into easy acquiescence"- O.J.Campbell
unwary