CVE-2026-69603: Windows Hyper-V Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.
Other sources
Windows Hyper-V Remote Code Execution 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 6.3.9600.23397Patch KB5123066 - Upgrade
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Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
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Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
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Fixed in 10.0.26100.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.26100.33438Patch KB5122871 - 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 10.0.22631.7582Patch KB5122880 - Upgrade
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Fixed in 10.0.19045.7725Patch KB5122878 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
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
What level of access does an attacker need to exploit this issue?
An attacker must already be authorized with local access to the affected system. The vulnerability does not indicate that unauthenticated remote exploitation is possible.
Which systems should be evaluated for exposure?
Evaluate systems running Windows Hyper-V on the listed Windows 10, Windows 11, and Windows Server releases from 2012 through 2025. The provided data does not state whether Hyper-V must be enabled or whether default installations are affected.
What could a successful exploit allow?
Successful exploitation can allow code execution and is rated as having high confidentiality, integrity, and availability impact. The scope is changed, indicating the impact can extend beyond the initially vulnerable security authority.