Why does the NVD search engine return hyperlinks to non-NVD vulnerability resources?
NVD integrates together all publicly available U.S. government vulnerability resources within a single search engine. Thus, when you do a search, NVD returns all relevant U.S. government hyperlinks. NVD always returns an NVD vulnerability summary for each CVE vulnerability. The “Resource Status” section on the NVD left bar shows how many non-NVD U.S. government vulnerability resources are integrated into NVD. Note that NVD also contains large numbers of industry vulnerability references within the NVD vulnerability summaries.
