CVE-2026-69490: Windows USB Mass Storage Class Driver Elevation of Privilege Vulnerability
Out-of-bounds read in Windows USB Mass Storage Class Driver allows an unauthorized attacker to elevate privileges with a physical attack.
Other sources
Windows USB Mass Storage Class 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 10.0.26100.33438Patch KB5122871 - Upgrade
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Fixed in 10.0.26100.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.22631.7582Patch KB5122880 - Upgrade
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Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
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Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
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Fixed in 10.0.19045.7725Patch KB5122878 - Upgrade
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Fixed in 6.3.9600.23397Patch KB5123066 - Upgrade
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Fixed in 10.0.26200.9445Patch KB5124008 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.2954Patch KB5124012 - Upgrade
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Fixed in 10.0.19044.7725Patch KB5122878 - Upgrade
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Fixed in 10.0.17763.9245Patch KB5122876 - Upgrade
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Fixed in 10.0.20348.5622Patch KB5122882
Event History
Frequently Asked Questions
Who is realistically exposed to this vulnerability?
Systems running any of the listed Microsoft Windows client or server versions are in scope if an attacker can obtain physical access. The attack vector is physical, so remotely reachable systems are not directly exposed through this issue alone.
What does an attacker need to exploit it?
The attacker needs physical access to the affected Windows system. No privileges or user interaction are required according to the provided severity vector.
What is the potential impact if exploitation succeeds?
Successful exploitation can allow elevation of privilege. The provided impact ratings indicate high confidentiality, integrity, and availability impact.
How can I determine whether a system is affected?
Identify whether the system runs one of the listed Windows versions: Windows 10, Windows 11, or Windows Server 2012, 2012 R2, 2016, 2019, 2022, or 2025. The provided data does not include fixed build numbers or update identifiers.