Lt. Lincoln Hoshino says the confrontation occurred at Cruise's Beverly Hills residence about 9:30 p.m. PDT Sunday when the actor and his family weren't home.
The guard saw a man "climbing a fence to gain access to the property" and he used the stun gun to detain him for police.
The officer tells City News Service that the man was identified as a 41-year-old neighbor who lives in an adjacent property, and was intoxicated at the time.
The man was taken into custody for trespassing and treated at a hospital for any problems stemming from the stun gun.
