On Friday , a cache of hacking tools allegedly developed by the US National Security Agency was dumped online . The news was explosive in the digital security community because the tools contained methods to hack computers running Windows , meaning millions of machines could be at risk . Security experts who tested the tools , leaked by a group called the Shadow Brokers , found that they worked . They were panicked : This is really bad , in about an hour or so any attacker can download simple toolkit to hack into Microsoft based computers around the globe . — Hacker Fantastic ( @ hackerfantastic ) April 14 , 2017 But just hours later , Microsoft announced that many of the vulnerabilities were addressedVulnerability-related.PatchVulnerabilityin a security update releasedVulnerability-related.PatchVulnerabilitya month ago . “ Today , Microsoft triaged a large release of exploits made publicly available by Shadow Brokers , ” Philip Misner , a Microsoft executive in charge of security wrote in a blog post . “ Our engineers have investigated the disclosed exploits , and most of the exploits are already patchedVulnerability-related.PatchVulnerability. ” Misner ’ s post showed that three of nine vulnerabilities from the leak were fixedVulnerability-related.PatchVulnerabilityin a March 14 security update . As Ars Technica pointed out , when security holes are discoveredVulnerability-related.DiscoverVulnerability, the individual or organization that foundVulnerability-related.DiscoverVulnerabilitythem is usually credited in the notes explaining the update . No such acknowledgment was found in the March 14 update . Here ’ s a list of acknowledgments for 2017 , showing credit for finding security problems in almost every update . One theory among security practitioners is that the NSA itself reportedVulnerability-related.DiscoverVulnerabilitythe vulnerabilities to Microsoft , knowing that the tools would be dumped publicly . Microsoft told ZDNet that it might not list individuals who discoverVulnerability-related.DiscoverVulnerabilityflaws for a number of reasons , including by request from the discoverer . The US government has not commented on this leak , though previous leaks by the Shadow Brokers claiming to be NSA hacking tools were confirmed at least in part by affected vendors and NSA whistleblower Edward Snowden .