CVE-2026-87706: Windows Storage Spaces Controller Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.
Other sources
Windows Storage Spaces Controller 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 10.0.22631.7582Patch KB5122880 - Upgrade
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Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
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Fixed in 10.0.26200.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.19045.7725Patch KB5122878 - Upgrade
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Fixed in 10.0.28000.2954Patch KB5124012 - Upgrade
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Fixed in 10.0.26100.9445Patch KB5124008 - 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 10.0.14393.9512Patch KB5123099 - Upgrade
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Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
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Fixed in 6.3.9600.23398Patch KB5123066
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must already be authorized to access the affected Windows system and exploit it locally. It is not described as remotely exploitable or requiring user interaction.
What level of impact could successful exploitation have?
Successful exploitation can elevate the attacker’s privileges and has high potential impact on confidentiality, integrity, and availability. An attacker could gain greater control over the affected system than their existing account permits.
Which systems should be assessed?
Assess Microsoft Windows 10 and Windows 11, plus Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 systems. The provided information does not identify affected build numbers, update levels, or configuration-specific exposure.