NSA Reports Major Windows 10 Flaw to Microsoft, Patch Coming Today


Windows 10

It’s “Patch Tuesday” for Microsoft, and this is an important one. Not only is this the end of the road for Windows 7, but Microsoft is releasing a major fix for Windows 10 thanks to the National Security Agency (NSA). The NSA reportedly uncovered a serious flaw in Windows 10, and it took the unusual but welcome step of telling Microsoft about it.

Despite its name, the NSA is not aimed at improving security for the general public. Its goal of gathering intelligence and monitoring national communication networks is not served by patching vulnerabilities when it can weaponize them instead. That’s why, traditionally, the NSA keeps these security holes a secret so it can use them against targets.

The vulnerability affects the way Windows 10 verifies digital signatures. That could allow a malicious software package to masquerade as a legitimate installer without tripping any alarms. Thus, someone could leverage the bug to remotely install malware and give it access to the entire system. From the NSA’s perspective, that’s a useful tool for cyberespionage, provided your target is using Windows 10. There’s a reasonable chance they will be, considering Windows 10 is the most popular desktop operating system in the world.


The new Windows 10 flaw is similar to EternalBlue, which fueled the WannaCry ransomware.

People briefed on the matter liken this vulnerability to EternalBlue, a flaw that affected most versions of Windows until 2017. The NSA used EternalBlue to break into computers for five years, but then the tool found its way into the hands of other organizations. As a result, EternalBlue fueled major malware campaigns like the WannaCry and NotPetya ransomware outbreaks. While the new vulnerability isn’t as severe as EternalBlue (it only affects Windows 10), it could allow for similar attacks if it ever got out. Perhaps that’s why the NSA opted to alert Microsoft instead of trying to weaponize the flaw.

Microsoft should release the patch today for all Windows 10 users. We also expect a statement on the vulnerability, urging everyone to update as soon as possible. While it’s better than the NSA disclosed the flaw to Microsoft, it could still serve as the basis for online attacks if users don’t update their systems. The NSA claims there are no currently active exploits online that use this vulnerability, but that could change in an instant.

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