CVE-2026-34337: Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.
Other sources
Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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Fixed in 10.0.17763.8755Patch KB5087538 - Upgrade
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Fixed in 10.0.26100.8457Fixed in 10.0.26100.8390Patch KB5089466 - Upgrade
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Fixed in 10.0.28000.2113Patch KB5089548 - Upgrade
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Fixed in 10.0.26100.32860Fixed in 10.0.26100.32772Patch KB5087423 - Upgrade
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Fixed in 10.0.25398.2330Patch KB5087541 - Upgrade
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Fixed in 10.0.26200.8457Fixed in 10.0.26200.8390Patch KB5089466 - Upgrade
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Fixed in 10.0.19044.7291Patch KB5087544 - Upgrade
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Fixed in 10.0.19045.7417Patch KB5094127 - Upgrade
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Fixed in 10.0.22631.7219Patch KB5093998 - Upgrade
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Fixed in 10.0.22631.7079Patch KB5087420 - Upgrade
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Fixed in 10.0.20348.5139Fixed in 10.0.20348.5074Patch KB5087424
Event History
Frequently Asked Questions
What is the severity of CVE-2026-34337?
The severity of CVE-2026-34337 is considered to be high due to its potential for local privilege escalation.
How do I fix CVE-2026-34337?
To fix CVE-2026-34337, you should apply the appropriate security updates provided by Microsoft for your operating system version.
What systems are affected by CVE-2026-34337?
CVE-2026-34337 affects multiple versions of Windows 10 and Windows 11, specifically certain builds of these operating systems.
What kind of vulnerability is CVE-2026-34337?
CVE-2026-34337 is an elevation of privilege vulnerability caused by a use-after-free condition in the Windows Cloud Files Mini Filter Driver.
Can CVE-2026-34337 be exploited remotely?
CVE-2026-34337 requires local access for exploitation, meaning an attacker must have physical or remote desktop access to the vulnerable system.