The US agency responsible for maintaining and designing the nation’s cache of nuclear weapons was among those breached by a hack of Microsoft Corp.’s SharePoint document management software, according to a person with knowledge of the matter.

Chinese hackers breached the U.S. National Nuclear Security Administration through Microsoft SharePoint, with the Energy Department confirming no sensitive information was stolen.

Personal relationship between Kim Jong Un and Donald Trump 'is not bad,' says sister of the North Korean leader - Anadolu Ajansı

The agency, whose fewer than 1,900 federal employees oversee the more than 60,000 contractors who build and maintain the U.S. nuclear arsenal, has struggled to fill crucial safety roles.

The Senate draft of a defense policy bill would reclassify National Nuclear Security Administration employees.

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.

Hours after Microsoft revealed hacking groups affiliated with the Chinese government have been exploiting a flaw in its SharePoint software, Bloomberg News reports that the National Nuclear Security Administration has also been breached in the attacks.

Unknown threat actors have breached the National Nuclear Security Administration's network in attacks exploiting a recently patched Microsoft SharePoint zero-day vulnerability chain.