If exploited, attackers can gain full access to SharePoint content and potentially pivot to Outlook, Teams, and OneDrive.

Microsoft says the Chinese threat actors Linen Typhoon, Violet Typhoon, and Storm-2603 have been exploiting the ToolShell ...

The name was coined by Dinh Ho Anh, a researcher from Khoa of Viettel Cyber Security, who developed the exploit. The ...

Hackers with ties to the Chinese government have been linked to a recent wave of widespread attacks targeting a Microsoft ...

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

A China-based hacking group is deploying Warlock ransomware on Microsoft SharePoint servers vulnerable to widespread attacks ...

The term "zero-day" attack refers to when a previously unknown vulnerability is targeted. Tens of thousands of servers are ...

The active exploitation of a dangerous zero-day vulnerability chain in Microsoft SharePoint – which was disclosed over the ...

Microsoft’s security analysts confirm that a number of cyber attacks on on-premise SharePoint Server users involve ransomware ...

Microsoft has released security patches for the zero-day vulnerability chain dubbed ToolShell, capable of remote code ...

Patches for two vulnerable editions of Microsoft's on-premises SharePoint Server collaboration tool are now available, with ...

Microsoft also has issued a patch for a related SharePoint vulnerability — CVE-2025-53771; Microsoft says there are no signs ...