Governments, schools, healthcare providers and large enterprise firms are at risk, one cyber threat intelligence chief said.

The hackers behind the initial wave of attacks exploiting a zero-day in Microsoft SharePoint servers have so far primarily targeted government organizations, according to researchers and news reports.

Microsoft warns of active attacks on SharePoint servers used by government and businesses, urging immediate security updates. The FBI is aware and collaborating with partners. A zero-day vulnerability has put tens of thousands of servers at risk,

More information has emerged on the ToolShell SharePoint zero-day attacks, including impact, victims, and threat actors.

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 newly discovered vulnerability in Microsoft’s SharePoint platform has spurred a mad frenzy from hackers — leading to breaches of some Microsoft clients.

Microsoft released an emergency security patch on Sunday to “mitigate active attacks targeting on-premises servers.”

Over 100 organizations were hacked via a SharePoint flaw. Governments and businesses targeted in a major Microsoft server breach.

At least 85 servers worldwide have been compromised through a Microsoft service vulnerability that has been used to achieve remote code execution.

The number of companies and organizations compromised by a security vulnerability in Microsoft Corp.’s SharePoint servers is increasing rapidly, with the tally of victims soaring more than six-fold in a few days,