Multiple reports surfaced Thursday that Lana's personal Snapchat page was hacked -- with some scumbag leaking a private sex tape from the account in an attempt to publicly embarrass her.

But fortunately, sources close to Lana tell us she's adamant she's NOT in the video -- and neither is her WWE superstar husband, Rusev.

In fact, we're told the Snapchat account that published the video does NOT belong to Lana -- though, it was intentionally created to look like it does.

There's a female voice in the sex video -- but as one Lana source puts it, "The voice in the clip is clearly not her."

Bottom line -- sorry, perverts ... not this time.