CVE-2026-69420: Microsoft VOLSNAP.SYS Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows VOLSNAP.SYS allows an authorized attacker to elevate privileges locally.
Other sources
Microsoft VOLSNAP.SYS Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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Fixed in 6.3.9600.23397Patch KB5123066 - Upgrade
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Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
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Fixed in 10.0.28000.2954Patch KB5124012 - Upgrade
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Fixed in 6.2.9200.26349Patch KB5123065 - 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 10.0.22631.7582Patch KB5122880 - 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 10.0.19044.7725Patch KB5122878 - Upgrade
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Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
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Fixed in 10.0.17763.9245Patch KB5122876
Event History
Frequently Asked Questions
Does exploitation require remote access or user interaction?
No. The vulnerability is rated with local attack vector and requires no user interaction. An attacker must already be authorized on the affected system with low privileges.
Which Windows versions are identified as affected?
The listed products are Windows 10, Windows 11, and Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025.
What could an attacker achieve after exploiting this issue?
Successful exploitation can elevate an authorized local attacker’s privileges. The provided severity vector indicates high impact to confidentiality, integrity, and availability.