The Channel 4 News broadcaster had previously mentioned the incident in his 2004 autobiography Shooting History, but explained that the aftermath of revelations about Jimmy Savile had left him "regurgitating... guilt and confusion".
In a blog post titled 'Our Sexual Watershed', Snow wrote: "The swirl of allegation and denial that is filling the airwaves is forcing many to relive the abuse inflicted upon them. I know this in part because in a small way I too was a victim as a child...
"This is a dramatic moment in the affairs of men and women; we shall all be tested. But don't underestimate what this time means to the abused. I know, I was 6 years old when a member of the domestic staff at the school, where my father taught, abducted me.
"He took me to his room and undressed me, and then himself. Thank heavens someone saw the abduction and eventually a member of staff intervened and rescued me.
"I remember to this day fretting over not being able to do my braces up. And I admit that I have found Savile regurgitating the guilt and confusion that I felt."
Snow said that those who had revealed abuse by Savile were "courageous individuals", and noted that in speaking out, they had "inspired others to come forward to expose their abusers".
However, he urged society - including broadcasters and lawmakers - to "tread with diligence and great care to both accuser and accused".
"We owe it to those who suffered in a hopefully departing age, to have the full protection of us all in ensuring that their claims thoroughly investigated and responded to," Snow added.
"No amount of effort in responding to complainants must be spared, but neither must it be allowed to become a witch-hunt. We face some delicate balances in which the welfare of many is at stake. But I suspect the journey has only just begun."