U.S. National Nuclear Security Administration was among those breached by a hack of Microsoft's SharePoint document management software, Bloomberg News reported on Tuesday, citing a person with knowledge of the matter.

The active exploitation of a zero-day vulnerability in Microsoft SharePoint has led to a sweeping cyberattack involving over 100 organizations, including the U.S. National Nuclear Security Administration.

A widespread cyberattack, attributed to Chinese state-sponsored hackers, compromised over 100 organizations globally, including the US National Nuclea