Microsoft has issued an alert about “active attacks” on server software used by government agencies and businesses to share documents within organizations, and recommended security updates that customers should apply immediately.

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,

A warning has been issued to Microsoft users detailing a cybersecurity flaw that allowed hackers to access its SharePoint servers, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) announced.