CVE-2026-62771: Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Heap-based buffer overflow 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
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
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Fixed in 10.0.28000.2704Patch KB5121000 - Upgrade
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Fixed in 10.0.26200.9168Fixed in 10.0.26100.9106Patch KB5120994 - Upgrade
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Fixed in 10.0.19044.7663Patch KB5120249 - Upgrade
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Fixed in 10.0.20348.5499Fixed in 10.0.20348.5440Patch KB5120229 - Upgrade
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Fixed in 10.0.19045.7663Patch KB5120249 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9168Fixed in 10.0.26000.9106Patch KB5120994 - Upgrade
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Fixed in 10.0.22631.7517Patch KB5120240 - Upgrade
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Fixed in 10.0.26100.9168Fixed in 10.0.26100.9106Patch KB5120994 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9115Patch KB5120238
Event History
Frequently Asked Questions
What is the severity of CVE-2026-62771?
CVE-2026-62771 has a severity rating of high, with a score of 7.8.
How can CVE-2026-62771 be exploited?
CVE-2026-62771 can be exploited by an authorized attacker who utilizes a heap-based buffer overflow in the Windows Cloud Files Mini Filter Driver.
What software is affected by CVE-2026-62771?
CVE-2026-62771 affects Microsoft Windows 10, Windows 11, Windows Server 2022, Windows Server 2019, and Windows Server 2025.
How do I fix CVE-2026-62771?
To fix CVE-2026-62771, apply the latest security updates provided by Microsoft for the affected Windows versions.
What are the potential impacts of CVE-2026-62771?
The potential impacts of CVE-2026-62771 include unauthorized privilege escalation, allowing an attacker to gain elevated access to system resources.