CVE-2026-50321: Windows USB Driver Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows USB Driver allows an authorized attacker to elevate privileges locally.
Other sources
Windows USB Driver Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7548Patch KB5099539 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9339Patch KB5099535 - Upgrade
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Fixed in 10.0.20348.5386Patch KB5099540 - Upgrade
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Fixed in 6.2.9200.26226Patch KB5099445 - Upgrade
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Fixed in 10.0.17763.9020Patch KB5099538 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23291Patch KB5099444 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.2525Patch KB5101649 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33158Patch KB5099536 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.8875Patch KB5101650 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.8875Patch KB5101650 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19045.7548Patch KB5099539
Event History
Frequently Asked Questions
What is the severity of CVE-2026-50321?
The severity of CVE-2026-50321 is rated as high, with a score of 7.8.
How do I fix CVE-2026-50321?
To fix CVE-2026-50321, you can apply the patch provided by Microsoft for affected Windows versions.
What software is affected by CVE-2026-50321?
CVE-2026-50321 affects multiple versions of Microsoft Windows, including Windows 10, Windows 11, and several Windows Server editions.
What type of vulnerability is CVE-2026-50321?
CVE-2026-50321 is a Windows USB Driver Elevation of Privilege Vulnerability caused by a race condition in shared resource execution.
Who can exploit CVE-2026-50321?
An authorized attacker can exploit CVE-2026-50321 locally to elevate their privileges.