CVE-2023-24950Network attack vector

Server NTLM hash disclosure via site creation

Published May 9, 2023 · Updated Jul 10, 2025

SharePoint Server spoofing allows remote authenticated users with site-creation rights to disclose the server's NTLM hash. Microsoft identifies improper input validation but does not disclose the affected handler, input, or validation error. Exploitation requires permission to create a site; the published impact is credential-hash disclosure with no integrity or availability effect.

CVSS severity6.5
Medium
EPSS probability67.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SharePoint Server spoofing allows remote authenticated users with site-creation rights to disclose the server's NTLM hash. Microsoft identifies improper input validation but does not disclose the affected handler, input, or validation error. Exploitation requires permission to create a site; the published impact is credential-hash disclosure with no integrity or availability effect.

The record

CVE
CVE-2023-24950
Published
May 9, 2023
Updated
Jul 10, 2025
Vendor
Microsoft
Product
Microsoft SharePoint Enterprise Server 2016
Classifications
CWE-20, T1187
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2025Record 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 <16.0.5395.1000

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft SharePoint Enterprise Server 2016version=16.0.0 <16.0.5395.1000
Microsoft · Microsoft SharePoint Server 2019version=16.0.0 <16.0.10398.20000
Microsoft · Microsoft SharePoint Server Subscription Editionversion=16.0.0 <16.0.16130.20420

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-20Improper Input Validation
T1187Forced Authentication

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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