Chinese hackers targeting Microsoft SharePoint zero-day vulnerability

Recent reports expose a significant security threat affecting Microsoft SharePoint.

Chinese hackers exploit SharePoint zero-day vulnerability

Security experts from Microsoft and Google report that Chinese-backed hackers are actively exploiting a zero-day vulnerability in Microsoft SharePoint. This flaw, identified as CVE-2025-53770, allows attackers to steal sensitive information from self-hosted SharePoint servers, which many organizations use for document management. These hackers can not only implant malware but also gain access to the internal data stored on the affected systems. Microsoft has noted that this vulnerability has been exploited since at least July and is connected to several hacking groups, including Linen Typhoon and Violet Typhoon, both notorious for their focus on espionage and intellectual property theft. While Microsoft has issued security patches, organizations are urged to assume they may already be compromised if they are running outdated versions of SharePoint.

The ongoing exploitation of this SharePoint vulnerability highlights the increasing sophistication of cyber threats from state-sponsored groups. Companies that rely on self-hosted solutions like SharePoint must prioritize cybersecurity measures, especially as vulnerabilities are discovered faster than patches can be deployed. This incident underscores a pressing need for organizations to take a proactive stance on their IT security, as attacks are not only targeting financial information but also sensitive intellectual assets. The involvement of multiple hacking groups suggests a wider campaign that could disrupt businesses ranging from governmental agencies to private corporations.

Highlights

The implications of this hacking campaign may resonate across multiple industries, prompting urgent calls for improved cybersecurity protocols.