Reading and QPR are all-but down, with Villa just three points above 18th-placed Wigan, who have a game in hand on Lambert's side.
But Lambert is convinced the likes of Newcastle, Stoke, Sunderland and Norwich are not safe yet, with the game against Paolo Di Canio's team key to both side's chances of survival.
"Even above (Sunderland), nobody's out of it," said the Scotsman.
"The way the fixtures have been thrown up this weekend, there's points there to be won and points obviously that people are going to lose.
"I'm pretty sure if you asked the teams above us, there would be a few saying the same.
Two victories from their remaining games with Sunderland, Norwich, Chelsea and Wigan would take Villa to the 40-point mark that should be enough to retain their Premier League status.
But Lambert would not be drawn when asked if that would be good enough for survival.
"I'm not sure because you don't know how other results go but you won't be far away from it," he added.
"It's in our own hands, that's the good thing. It would be different if we had to rely on other people but we don't. You look after your own, and if we do that then we'll see what happens.
"I don't think you can (get too caught up in the permutations), then you start to deflect from what you want to do yourself."
As for the Sunderland game, Lambert admitted the result will have extra significance with both sides battling form points at the wrong end of the table.
"When it's this stage of the season and two teams are close against each other, things happen that may not happen when it's midway through the season," he said.
"I won't need to lift the lads, that's for sure, they'll know what's at stake on Monday so I won't need to motivate them in that way.
"The way the season has gone there's not much in it (between the teams) at all. We went up there and won a few months ago (a 1-0 victory on 3 November) and we'll have to try to win again."