"Curtin University became aware on Sunday that its Curtin Singapore website was defaced and immediately disabled the website," said Ian Callahan, corporate services vice-president at the university.
The university added that "the security breach was resolved and the website was back online by mid-afternoon" on Monday.
The police have been informed of the incident, according to a report by Channel News Asia.
The defaced Curtin Singapore website stated "Hacked by Islamic State", while the militant group's flag was also displayed.
The university's website has since been restored to its original state, according to the channel.