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Security researchers say hackers have breached at least 400 organizations by exploiting a zero-day vulnerability in Microsoft SharePoint, signaling a sharp rise in the number of detected compromises ...

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 has alerted businesses and governments to "active attacks" on its popular SharePoint collaboration software. Patches have been issued for two versions of SharePoint software, while one ...

The U.S. federal government and cybersecurity researchers say a newly discovered security bug found in Microsoft’s SharePoint is under attack. U.S. cybersecurity agency CISA sounded the alarm this ...

Authorities and researchers are sounding the alarm over the active mass exploitation of a high-severity vulnerability in Microsoft SharePoint Server that’s allowing attackers to make off with ...

Update, July 21, 2025: This story, originally published on July 20, has been updated to include additional expert comments regarding the global zero-day attack impacting Microsoft on-premise ...

Microsoft has released emergency SharePoint security updates for two zero-day vulnerabilities tracked as CVE-2025-53770 and CVE-2025-53771 that have compromised services worldwide in "ToolShell" ...

Hackers exploited a major security flaw in widely used Microsoft server software to launch a global attack on government agencies and businesses in the past few days, breaching U.S. federal and state ...