Local privilege escalation via Win32K race condition
Published Jul 14, 2026 · Updated Jul 14, 2026
Race condition in Microsoft Windows Win32K allows local users with low privileges to elevate privileges on affected Windows systems. Microsoft identifies improper synchronization of a shared resource during concurrent execution, but has not disclosed the specific Win32K object, function, or operation involved. Successful exploitation requires local access and an existing low-privilege account, and it crosses a security boundary to grant elevated control over the host.
Summary
What happened
Race condition in Microsoft Windows Win32K allows local users with low privileges to elevate privileges on affected Windows systems. Microsoft identifies improper synchronization of a shared resource during concurrent execution, but has not disclosed the specific Win32K object, function, or operation involved. Successful exploitation requires local access and an existing low-privilege account, and it crosses a security boundary to grant elevated control over the host.
The record
- CVE
- CVE-2026-54107
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-362, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 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.
- Affected versionversion=10.0.17763.0 <10.0.17763.9020
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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