The company says several Chinese state-aligned groups have exploited the zero-day vulnerability disclosed on Saturday.

The zero-day vulnerability — which was first disclosed late Saturday — has been exploited by several Chinese state-aligned ...

A series of cyberattacks targeting Microsoft collaboration software, specifically SharePoint, have been linked to Chinese ...

The National Nuclear Security Administration, which oversees the design and upkeep of America’s nuclear weapons arsenal, was among those whose systems were ...

Though the vulnerability was first identified in May, it's taken more than two months for Microsoft to issue an effective fix.

Microsoft identified three China-based hacking groups targeting SharePoint vulnerabilities in the ongoing cyberattack, and ...

China-linked hackers used SharePoint vulnerabilities to breach U.S. nuclear and health agencies in a broad global campaign, ...

Chinese hackers breached the U.S. National Nuclear Security Administration through Microsoft SharePoint, with the Energy ...

The company said state-backed hacking groups were breaching systems through flaws in SharePoint, which is used by the U.S.

Major cyberattacks in 2025 so far have included the Microsoft SharePoint Server “ToolShell” attacks, the ransomware attack ...

A critical SharePoint zero-day (CVE-2025-53770) has been used to breach 400 firms, including the US nuclear agency. Microsoft ...