One of the hacked organizations reportedly includes the U.S. agency responsible for maintaining the country's stockpile of nuclear weapons. China-backed hackers have been observed carrying out the hacks targeting SharePoint servers.

The US agency overseeing nuclear weapons breached in a China-linked hack of Microsoft SharePoint, according to Bloomberg. Officials say no classified data was exposed and the impact was limited.

Victims of the recent global hacking campaign include the National Institutes of Health and the National Nuclear Security Administration, officials said.