CVE-2024-38200Network attack vector

NTLM hash disclosure via crafted content

Published Aug 8, 2024 · Updated Jul 10, 2025

Information disclosure in Microsoft Office 2016, 2019, LTSC 2021, and Microsoft 365 Apps allows remote attackers to capture NTLM hashes. Microsoft has not published the affected Office component or the operation that makes crafted files or web content initiate outbound NTLM authentication. Exploitation requires user interaction with crafted content and exposes authentication material for relay attacks or offline password cracking.

CVSS severity6.5
Medium
EPSS probability20.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Microsoft Office 2016, 2019, LTSC 2021, and Microsoft 365 Apps allows remote attackers to capture NTLM hashes. Microsoft has not published the affected Office component or the operation that makes crafted files or web content initiate outbound NTLM authentication. Exploitation requires user interaction with crafted content and exposes authentication material for relay attacks or offline password cracking.

The record

CVE
CVE-2024-38200
Published
Aug 8, 2024
Updated
Jul 10, 2025
Vendor
Microsoft
Product
Microsoft Office 2016
Classifications
CWE-200, T1187
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2024CVE 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 <16.0.5461.1001

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Office 2016version=16.0.0 <16.0.5461.1001
Microsoft · Microsoft Office 2019version=19.0.0 <https://aka.ms/OfficeSecurityReleases
Microsoft · Microsoft Office LTSC 2021version=16.0.1 <https://aka.ms/OfficeSecurityReleases
Microsoft · Microsoft 365 Apps for enterpriseversion=16.0.1 <https://aka.ms/OfficeSecurityReleases

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
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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