CVE-2026-103555: Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulnerability
Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.
Other sources
Virtual Hard Disk (VHD) Miniport 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 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
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Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
Who is exposed to this issue?
Systems running one of the listed Microsoft Windows 10, Windows 11, or Windows Server versions are potentially exposed. Exploitation is local, so it does not directly provide a remote entry point.
What access does an attacker need to exploit it?
An attacker must already be authorized on the affected system and have local access. The vulnerability can then be used to elevate privileges.
How difficult is exploitation expected to be?
The supplied vector rates attack complexity as high and privileges required as low. No user interaction is required.
What is the potential impact after successful exploitation?
Successful exploitation can result in high impact to confidentiality, integrity, and availability. The stated outcome is local privilege elevation.