The incident has reportedly impacted the servers of federal agencies, schools, and energy companies. Some emergency patches have been deployed. On July 19, Microsoft alerted users that it was experiencing an active cyberattack on its SharePoint servers,

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

Federal cybersecurity officials have issued a warning to Microsoft users about a security flaw allowing hackers to access to certain SharePoint systems.

Microsoft has issued a stark warning about a recent cyberattack targeting critical infrastructure, including the U.S. National Nuclear Security Administration (NNSA), exposing vulnerabilities in its SharePoint software.

NEW YORK (AP) — Microsoft has issued an emergency fix to close off a vulnerability in Microsoft’s SharePoint software that hackers have exploited to carry out widespread attacks on businesses and at least some federal agencies.

Unknown attackers exploited a vulnerability in Microsoft’s SharePoint collaboration software, hitting targets around the world.