CVE-2026-40365

HIGH

Microsoft SharePoint Server Remote Code Execution Vulnerability

Title source: cna
STIX 2.1

Description

Insufficient granularity of access control in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Microsoft SharePoint Server Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40365

Scores

CVSS v3 8.8
EPSS 0.0007
EPSS Percentile 21.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-1220
Status published
Products (6)
Microsoft/Microsoft SharePoint Enterprise Server 2016 16.0.0 - 16.0.5552.1002
Microsoft/Microsoft SharePoint Server 2019 16.0.0 - 16.0.10417.20128
Microsoft/Microsoft SharePoint Server Subscription Edition 16.0.0 - 16.0.19725.20280
microsoft/sharepoint_server 2016
microsoft/sharepoint_server 2019
microsoft/sharepoint_server < 16.0.19725.20280
Published May 12, 2026
Tracked Since May 12, 2026