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CVE-2026-20945— Microsoft SharePoint Server Spoofing Vulnerability

Quick assessment

Affected
Microsoft Microsoft SharePoint Enterprise Server 2016
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Office Sharepoint Server是美国微软（Microsoft）公司的一款为企业客户而设计的、基于web的内容管理和协作工具。该软件初始版本以Office组件形式存在，现在也仍然大大依托于Office，以提供企业门户、文档协同等功能为主，之后版本支持将Office、Exchange、Lync、Project和Visio结合起来。 Microsoft Office SharePoint存在跨站脚本漏洞。攻击者利用该漏洞执行欺骗攻击。以下产品和版本受到影响：Microsof

CVSS 4.6 · Medium EPSS 19.07% · P97

Affected Version Matrix 3

VendorProduct Version RangeStatus
Microsoft Microsoft SharePoint Enterprise Server 2016 16.0.0< 16.0.5548.1003 affected
Microsoft Microsoft SharePoint Server 2019 16.0.0< 16.0.10417.20114 affected
Microsoft Microsoft SharePoint Server Subscription Edition 16.0.0< 16.0.19725.20210 affected
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I. Basic Information for CVE-2026-20945

Vulnerability Information
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Vulnerability Title
Microsoft SharePoint Server Spoofing Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Office Sharepoint Server 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Office Sharepoint Server是美国微软（Microsoft）公司的一款为企业客户而设计的、基于web的内容管理和协作工具。该软件初始版本以Office组件形式存在，现在也仍然大大依托于Office，以提供企业门户、文档协同等功能为主，之后版本支持将Office、Exchange、Lync、Project和Visio结合起来。 Microsoft Office SharePoint存在跨站脚本漏洞。攻击者利用该漏洞执行欺骗攻击。以下产品和版本受到影响：Microsof
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft SharePoint Enterprise Server 2016 16.0.0 ~ 16.0.5548.1003 -
Microsoft Microsoft SharePoint Server 2019 16.0.0 ~ 16.0.10417.20114 -
Microsoft Microsoft SharePoint Server Subscription Edition 16.0.0 ~ 16.0.19725.20210 -

II. Public POCs for CVE-2026-20945

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III. Intelligence Information for CVE-2026-20945

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Same Patch Batch · Microsoft · 2026-04-14 · 163 CVEs total

CVE-2026-33824 9.8 CRITICAL Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability
CVE-2026-26149 9.0 CRITICAL Microsoft Power Apps Desktop Client Spoofing Vulnerability
CVE-2026-32225 8.8 HIGH Windows Shell Security Feature Bypass Vulnerability
CVE-2026-26167 8.8 HIGH Windows Push Notifications Elevation of Privilege Vulnerability
CVE-2026-32157 8.8 HIGH Remote Desktop Client Remote Code Execution Vulnerability
CVE-2026-33120 8.8 HIGH Microsoft SQL Server Remote Code Execution Vulnerability
CVE-2026-32171 8.8 HIGH Azure Logic Apps Elevation of Privilege Vulnerability
CVE-2026-26178 8.8 HIGH Windows Advanced Rasterization Platform Elevation of Privilege Vulnerability
CVE-2026-27928 8.7 HIGH Windows Hello Security Feature Bypass Vulnerability
CVE-2026-32221 8.4 HIGH Windows Graphics Component Remote Code Execution Vulnerability
CVE-2026-32091 8.4 HIGH Microsoft Brokering File System Elevation of Privilege Vulnerability
CVE-2026-32162 8.4 HIGH Windows COM Elevation of Privilege Vulnerability
CVE-2026-33115 8.4 HIGH Microsoft Word Remote Code Execution Vulnerability
CVE-2026-33114 8.4 HIGH Microsoft Word Remote Code Execution Vulnerability
CVE-2026-32190 8.4 HIGH Microsoft Office Remote Code Execution Vulnerability
CVE-2026-33827 8.1 HIGH Windows TCP/IP Remote Code Execution Vulnerability
CVE-2026-27912 8.0 HIGH Windows Kerberos Elevation of Privilege Vulnerability
CVE-2026-33826 8.0 HIGH Windows Active Directory Remote Code Execution Vulnerability
CVE-2026-33098 7.8 HIGH Windows Container Isolation FS Filter Driver Elevation of Privilege Vulnerability
CVE-2026-23657 7.8 HIGH Microsoft Word Remote Code Execution Vulnerability

Showing top 20 of 163 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Microsoft SharePoint Enterprise Server 2016
Same vendor: Microsoft
Same weakness: CWE-79

V. Comments for CVE-2026-20945

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