Microsoft Patches SharePoint RCE Flaw CVE-2026-45659 Across Server Versions
Summary
Microsoft has released patches for a critical remote code execution (RCE) vulnerability in SharePoint, identified as CVE-2026-45659. Attackers can exploit this flaw to execute arbitrary code on affected servers without specialized conditions. The vulnerability has been assigned an important severity with a CVSS score of 8.8.
IFF Assessment
The identified vulnerability allows for remote code execution, presenting a significant threat to organizations using Microsoft SharePoint.
Severity
The CVSS score of 8.8 indicates a High severity vulnerability, likely due to its remote attack vector, the ability to execute arbitrary code, and the potential impact on confidentiality, integrity, and availability.
Defender Context
This update addresses a critical RCE flaw in SharePoint that requires immediate attention. Defenders should prioritize applying this patch to all vulnerable SharePoint servers to prevent potential exploitation. Unpatched systems remain at high risk of compromise, allowing attackers to gain control and potentially exfiltrate sensitive data.