CVE-2025-53770
Sharepoint ToolShell attacks targeted orgs across four continents
Hackers believed to be associated with China have leveraged the ToolShell vulnerability (CVE-2025-53770) in Microsoft SharePoint in attacks targeting government agencies, universities, telecommunication service providers, and finance organizations. The security flaw affects on-premise SharePoint servers and was disclosed as an actively exploited zero-day on July 20, after multiple hacking groups tied to China leveraged it in widespread […]
Microsoft releases emergency patches for SharePoint RCE flaws exploited in attacks
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” attacks. In May, during the Berlin Pwn2Own hacking contest, researchers exploited a zero-day vulnerability chain called “ToolShell,” which enabled them to achieve remote code execution in Microsoft SharePoint. These flaws were fixed as part […]
Microsoft SharePoint zero-day exploited in RCE attacks, no patch available
Critical zero-day vulnerabilities in Microsoft SharePoint, tracked as CVE-2025-53770 and CVE-2025-53771, have been actively exploited since at least July 18th, with no patch available and at least 85 servers already compromised worldwide. In May, Viettel Cyber Security researchers chained two Microsoft SharePoint flaws, CVE-2025-49706 and CVE-2025-49704, in a “ToolShell” attack demonstrated at Pwn2Own Berlin to achieve remote code execution. While […]