CVE-2026-63514

HIGH CVSS 3.1: 8.8 EPSS 1.52%
Updated Aug 12, 2026
Microsoft
Parameter Value
CVSS 8.8 (HIGH)
Affected Versions before 16.0.19725.20522
Fixed In 16.0.19725.20522
Type CWE-502 (Deserialization of Untrusted Data)
Vendor Microsoft
Public PoC No

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 3

Configuration From (including) Up to (excluding)
Microsoft Sharepoint_Server
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
16.0.19725.20522
Microsoft Sharepoint_Server
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
Microsoft Sharepoint_Server
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*