CVE-2024-38066

SYSTEM privilege escalation via Win32k use-after-free

Published Jul 9, 2024 · Updated Feb 10, 2026

Use-after-free in Win32k on affected Windows releases allows local users to elevate privileges to SYSTEM through local execution. Microsoft identifies the faulty component and weakness but has not disclosed the freed object, triggering operation, or invalid access. Exploitation requires an existing low-privilege account and no user interaction; success grants complete control of the affected system.

CVSS severity7.8
High
EPSS probability0.86%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Win32k on affected Windows releases allows local users to elevate privileges to SYSTEM through local execution. Microsoft identifies the faulty component and weakness but has not disclosed the freed object, triggering operation, or invalid access. Exploitation requires an existing low-privilege account and no user interaction; success grants complete control of the affected system.

The record

CVE
CVE-2024-38066
Published
Jul 9, 2024
Updated
Feb 10, 2026
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=10.0.10240.0 <10.0.10240.20710

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.20710
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.6054
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.7159
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.24975
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.24975
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.4651
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.7159
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.27219
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.27219
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.4651
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.22074
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.6054
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.7159
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.22769
Microsoft · Windows 10 Version 1809version=10.0.17763.0 <10.0.17763.6054
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.22074
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.22769

Published CVSS scores

7.8Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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