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.

Microsoft said in a post on its website on Saturday that it was “aware of active attacks targeting on-premises SharePoint Server customers by exploiting vulnerabilities.” SharePoint is a Microsoft platform that allows customers to manage and share documents within their organizations.

Microsoft warned users that hackers used a security flaw in its server software to attack government agencies and businesses around the world. The federal government, along with those in Canada and Australia, has launched an investigation into the hack that targeted SharePoint servers, The Washington Post reported.

A critical security vulnerability in Microsoft SharePoint has been actively exploited by threat actors to infiltrate thousands of organizations worldwide.

Hackers exploited a zero-day vulnerability in Microsoft SharePoint servers, targeting US federal agencies and other entities.

A major global hack targeting Microsoft’s SharePoint platform affects U.S. and other nations, exposing sensitive data.

Vulnerabilities in the software have allowed hackers to access file systems and execute code, the US Cybersecurity and Infrastructure Security Agency warned on Sunday.

A major cyberattack has hit Microsoft's SharePoint platforms, putting thousands of organizations at risk around the world. The attack began

Microsoft issued an alert about "active attacks" targeting its SharePoint server software, which is widely used by businesses and government agencies to share files.