"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.