The general cryptographic community was initially not aware of the potential backdoor, until of Dan Shumow and Niels Ferguson 2007 rediscovery, or of Certicom's Daniel R. L. Brown and Scott Vanstone's 2005 patent application describing the backdoor mechanism.
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It was only after Dan Shumow and Niels Ferguson's 2007 presentation that the potential for a backdoor became widely known.
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The Guardian and The New York Times have reported that the National Security Agency (NSA) inserted a CSPRNG into NIST SP 800-90A that had a backdoor which allows the NSA to readily decrypt material that was encrypted with the aid of Dual EC DRBG.
Green's has blogged on and been cited in news articles on NSA's backdoor in Dual EC DRBG, and RSA Security's usage of the backdoored CSPRNG.