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CVE-2026-45659

CRITICAL Export PDF

Microsoft SharePoint Server Vulnerability

Microsoft SharePoint Server contains a deserialization of untrusted data vulnerability which allows an authorized attacker to execute code over a network.

CVSS Score
9.8
CRITICAL
Published
01 Jul 2026 00:00
Modified
N/A
Vendor
Microsoft
Product
SharePoint Server
Source
CIRCL

Affected Versions

Fix Vendor Patch / Mitigation Available

Weaknesses (CWE)

CWE-502

Affected Systems

Microsoft
SharePoint Server
Microsoft
Windows Ancillary Function Driver For WinSock
SharePoint
Active Directory Federation Services
SharePoint Server
Windows
DirectX
Internet Explorer
Defender
Microsoft
Office
Visual Basic For Applications (VBA)

KEV Status

Known Exploited Vulnerability