CVE-2026-47634Network attack vector

Authenticated content spoofing via undisclosed output injection

Published Jun 9, 2026 · Updated Jun 9, 2026

Injection in Microsoft SharePoint Server 2019 and Subscription Edition allows remote authenticated users to spoof content over a network. Microsoft identifies improper neutralization of special elements in output consumed by a downstream component but has not disclosed the affected handler, input field, or output operation. A low-privileged account and user interaction are required; the published consequence is spoofed content with confidentiality and integrity effects, not a service interruption.

CVSS severity7.3
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Injection in Microsoft SharePoint Server 2019 and Subscription Edition allows remote authenticated users to spoof content over a network. Microsoft identifies improper neutralization of special elements in output consumed by a downstream component but has not disclosed the affected handler, input field, or output operation. A low-privileged account and user interaction are required; the published consequence is spoofed content with confidentiality and integrity effects, not a service interruption.

The record

CVE
CVE-2026-47634
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
Microsoft
Product
Microsoft SharePoint Server 2019
Classifications
CWE-74, CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=16.0.0 <16.0.10417.20153

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft SharePoint Server 2019version=16.0.0 <16.0.10417.20153
Microsoft · Microsoft SharePoint Server Subscription Editionversion=16.0.0 <16.0.19725.20384

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
7.3Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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