CVE-2023-36890Network attack vector

Authenticated information disclosure

Published Aug 8, 2023 · Updated Aug 10, 2026

Improper access control in Microsoft SharePoint Server 2019 and Subscription Edition allows remote authenticated users to read unspecified information. Microsoft has not published the affected component, the request or action that bypasses access control, or the data exposed. Exploitation requires low-privileged network access and causes confidentiality loss without reported integrity or availability impact.

CVSS severity6.5
Medium
EPSS probability1.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Microsoft SharePoint Server 2019 and Subscription Edition allows remote authenticated users to read unspecified information. Microsoft has not published the affected component, the request or action that bypasses access control, or the data exposed. Exploitation requires low-privileged network access and causes confidentiality loss without reported integrity or availability impact.

The record

CVE
CVE-2023-36890
Published
Aug 8, 2023
Updated
Aug 10, 2026
Vendor
Microsoft
Product
Microsoft SharePoint Server 2019
Classifications
CWE-284, T1213.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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 <16.0.10401.20025

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft SharePoint Server 2019version=16.0.0 <16.0.10401.20025
Microsoft · Microsoft SharePoint Server Subscription Editionversion=16.0.0 <16.0.16130.20684

Published CVSS scores

6.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-284Improper Access Control
T1213.002Sharepoint

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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