Find a source for that nsa story besides 'cryptobang' where any troller can pay 1 btc to have some dumb story written.
In fact the crypto code in monero comes from DJB the renowned cryptographer who is as close to a mortal enemy of the NSA as you will ever find.
The story is ridiculous. It's good trollbait though. If anyone cites it we know they are trolling and not doing any actual research.
i can see why you don't like that 'source' and are asking me to find a new one:
"It is likely that CN developers deliberately neglected
the Bernsteins rationale in order to make the backdoor possible. By inferring malice
aforethought on the CN developers part we may as well call them crooks. The vulnerability is exploited by
allowing to whoever has the knowledge to recover users private keys thereby de-anonymizing them through ring signature and key image
compromisation. "