CVE-2026-64922 - Microsoft SharePoint Server Spoofing Vulnerability

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MEDIUM

Microsoft SharePoint Server Spoofing Vulnerability

Published Aug 11, 2026

5.4

MEDIUM

CVSS 3.1

EPSS 0.58%

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.

Affected products

Vendor Microsoft Product Microsoft SharePoint Enterprise Server 2016 Default
n/a
- Version
  16.0.0
  Status
  affected
  Constraints
  <16.0.5565.1001
Vendor Microsoft Product Microsoft SharePoint Server 2019 Default
n/a
- Version
  16.0.0
  Status
  affected
  Constraints
  <16.0.10417.20198
Vendor Microsoft Product Microsoft SharePoint Server Subscription Edition Default
n/a
- Version
  16.0.0
  Status
  affected
  Constraints
  <16.0.19725.20522

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Microsoft

Microsoft SharePoint Enterprise Server 2016

n/a

Version	Status	Constraints
16.0.0	affected	<16.0.5565.1001

Microsoft

Microsoft SharePoint Server 2019

n/a

Version	Status	Constraints
16.0.0	affected	<16.0.10417.20198

Microsoft

Microsoft SharePoint Server Subscription Edition

n/a

Version	Status	Constraints
16.0.0	affected	<16.0.19725.20522

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (2)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-56425
Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64922
vendor-advisorypatchVendor Advisory

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-56425		Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64922		vendor-advisorypatchVendor Advisory