A sweeping cyber espionage operation targeting Microsoft server software compromised about 100 organizations as of the weekend, two of the organizations that helped uncover the campaign said.

Microsoft said it identified 2 groups as leveraging flaws in SharePoint software; China said it firmly opposes all forms of cyberattacks.

Russian cybercriminals are targeting Microsoft 365 accounts with specialized malware, the UK government's cybersecurity arm has warned.

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.

A major security vulnerability in Microsoft’s server software is being actively exploited by hackers, the Dutch National Cyber Security Center (NCSC) warned Monday. Microsoft has issued updates to mitigate the risk,

Matanbuchus 3.0 malware loader evolves with advanced stealth techniques, targeting companies via social engineering tactics.

Microsoft issued an emergency fix to close off a vulnerability in its SharePoint software that hackers have exploited to carry out widespread attacks on businesses and at least some federal agencies.