The video features Efron, then 17, in an episode of MTV's short-lived reality series Room Raiders. On the show, three people would have their rooms explored by another single person, who would then choose the person he or she wanted to date based on the state of their bedroom.
Efron was starring on the drama Summerland at the time, and would later be cast in Disney's High School Musical.
The now 24-year-old actor most recently starred in the animated movie The Lorax, with Taylor Swift, Betty White and Danny De Vito.
The Huffington Post has brought attention to the old MTV clip, in which an unknown Efron inspects the rooms of three teenaged girls. At one point in the video, Efron waves around a condom and handcuffs found in one contestant's bedroom.
Efron, whose career has been built on a relatively squeaky clean image due to his High School Musical success, had to explain dropping a condom at a recent premiere of The Lorax.
Watch Zac Efron on Room Raiders below: