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CVE-2026-26105

CRITICAL CVSS 3.1: 9.3 EPSS 0.04%
Updated Mar 13, 2026
Microsoft
Parameter Value
CVSS 9.3 (CRITICAL)
Affected Versions before 16.0.19725.20076
Fixed In 16.0.19725.20076
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor Microsoft
Public PoC No

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Attack Parameters

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

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 3

Configuration From (including) Up to (excluding)
Microsoft Sharepoint_Server
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
16.0.19725.20076
Microsoft Sharepoint_Server
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
Microsoft Sharepoint_Server
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*