regex python for matching exact number of characters with overlapping matches

Question

For example, I have a a string
t = "abftababcd"
I want to match a pattern
p= "abXX"
where X is a wild card and matches any character. For the given p and t I want to get
['abft', 'abab','abcd']
For p="XXab" the expected output is ['ftab', 'abab']

Now i want to match all the overlapping matches in string t. I have tried replacing X with
"ab\w{no.of X}"
This doesn't give overlapping matches. So i tried lookahead assertion as
"ab(?=(\w{no.of X}))"
Then this only gives me the matches with the pattern "ab". Also, does lookahead work if X is present in the beginning XXab of the string or in the middleaXXXb?