Hackers have exploited vulnerabilities in Microsoft’s SharePoint software, placing tens of thousands of on-premises servers used by global businesses and agencies at risk. Microsoft issued an alert on ...

Tech giant Microsoft on Tuesday said that three groups of China-based hackers were behind an ongoing cyberattack on its SharePoint file-sharing system. The Microsoft Security Response Center first ...

Microsoft is warning businesses about a previously-unknown security issue that has been exploited by cyber criminals against businesses and government agencies around the world for the past few weeks.

More than 10,000 organizations around the world are at risk from hackers after a serious security flaw was discovered in Microsoft’s popular Sharepoint platform, used to store and share confidential ...

Editor’s note: This is a guest analysis from Christopher Budd, who previously spent a decade at the Microsoft Security Response Center (MSRC). Emergency security teams know summer weekends are made ...

CISA has mandated immediate mitigation for federal agencies, while analysts urge enterprises to accelerate cloud migration and implement live threat detection. Attackers are exploiting a previously ...

A total of 396 compromised systems have been identified following the widespread exploitation of the Microsoft SharePoint zero-day vulnerability ToolShell (CVE-2025-53770/53771). Eye Security, the ...

Microsoft Corp. is investigating whether a leak from its early alert system for cybersecurity companies allowed Chinese hackers to exploit flaws in its SharePoint service before they were patched, ...

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 ...

Ransomware gangs have recently joined ongoing attacks targeting a Microsoft SharePoint vulnerability chain, part of a broader exploitation campaign that has already led to the breach of at least 148 ...

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