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Editor’s note: This is a guest analysis from Christopher Budd, who previously spent a decade at the Microsoft Security Response Center (MSRC). Emergency security teams know summer weekends are made ...

China-based threat actor Storm-2603 has been observed attacking on-premises SharePoint customers with Warlock ransomware. That comes from Microsoft, which on June 23 updated a blog post published the ...

LONDON, July 22 (Reuters) - A security patch Microsoft (MSFT.O), opens new tab released this month failed to fully fix a critical flaw in the U.S. tech giant's SharePoint server software, opening the ...

The US Nuclear Weapons Agency was one of the organization's breached yesterday after Microsoft's SharePoint document management software was hacked by unknown threat actors, according to sources.

Microsoft has revealed that Chinese state threat actors are actively targeting and exploiting a highly dangerous zero-day vulnerability in SharePoint Server, confirming earlier reports from Google ...

NEW YORK — Microsoft has issued an emergency fix to close off a vulnerability in Microsoft’s widely-used SharePoint software that hackers have exploited to carry out widespread attacks on businesses ...

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.

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 ...

Federal cybersecurity officials have issued a warning to Microsoft users about a security flaw allowing hackers to access to certain SharePoint systems. The U.S. Cybersecurity and Infrastructure ...

Microsoft has issued an urgent security alert warning of "active attacks" targeting SharePoint servers used by government agencies and businesses worldwide. The attacks, discovered over the weekend, ...

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" ...