Underprivileged (adjective)
Deprived of the opportunities and advantages of others, usually through no fault of one’s own.
Underprivileged (noun)
A deprived person; deprived people normally used as a plural.
Unprivileged (adjective)
Not having special privileges, opposite of privileged.
Unprivileged (adjective)
Not requiring special privileges
Wiktionary
Underprivileged (adjective)
(of a person) not enjoying the same standard of living or rights as the majority of people in a society
“needy and underprivileged members of the community”
“the plight of the underprivileged”
Unprivileged (adjective)
not having special rights, advantages, or immunities
“Mrs Weber is from an unprivileged background”
Oxford Dictionary