CVE-2026-20959

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-20959
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

4.6 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.1 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20959 Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
History

14 Jan 2026, 19:19

Type Values Removed Values Added
References () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20959 - () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20959 - Vendor Advisory
First Time Microsoft
Microsoft sharepoint Server
CPE cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*

13 Jan 2026, 18:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-13 18:16

Updated : 2026-01-14 19:19

NVD link : CVE-2026-20959

Mitre link : CVE-2026-20959

CVE.ORG link : CVE-2026-20959

JSON object : View

Products Affected

microsoft

  • sharepoint_server
CWE
CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')