High

SharePoint Flaw Initially Listed as Spoofing by Microsoft Enables Authenticated RCE

The Hacker News

September 22, 2026 at 11:17 AM

Overview

A vulnerability in SharePoint Server, originally labeled by Microsoft as a spoofing flaw with a CVSS score of 6.5, has been reclassified to allow for authenticated remote code execution (RCE). This flaw, identified as CVE-2026-65660, impacts SharePoint Server versions 2016, 2019, and Subscription Edition. Researcher Dinh Ho Anh Khoa from Viettel Cyber Security provided detailed technical insights, revealing the severity of the issue. The ability for attackers to execute remote code poses significant risks, especially for organizations relying on these SharePoint versions for collaboration and data management. Microsoft has released patches to address this vulnerability, and users are urged to apply these updates promptly to protect their systems.

Key Takeaways

Affected Systems: SharePoint Server 2016, SharePoint Server 2019, SharePoint Server Subscription Edition
Action Required: Patches have been released by Microsoft to address CVE-2026-65660.
Timeline: Newly disclosed

Original Article Summary

A SharePoint Server vulnerability that Microsoft initially classified as a spoofing flaw with a CVSS score of 6.5 actually enables authenticated remote code execution, according to full technical details published today by Viettel Cyber Security researcher Dinh Ho Anh Khoa. The flaw, CVE-2026-65660, affects SharePoint Server 2016, 2019, and Subscription Edition. Patches have been

Impact

SharePoint Server 2016, SharePoint Server 2019, SharePoint Server Subscription Edition

Exploitation Status

The exploitation status is currently unknown. Monitor vendor advisories and security bulletins for updates.

Timeline

Newly disclosed

Remediation

Patches have been released by Microsoft to address CVE-2026-65660. Users should apply these patches immediately to mitigate the risk.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Microsoft, Vulnerability, and 1 more.

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