CVE-2026-72927: Winsock Elevation of Privilege Vulnerability
Heap-based buffer overflow in Winsock allows an authorized attacker to elevate privileges locally.
Other sources
Winsock Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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Fixed in 10.0.28000.2954Patch KB5124012 - Upgrade
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Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
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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 10.0.26100.9445Patch KB5124008 - 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 10.0.26200.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.19045.7725Patch KB5122878 - 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 can exploit this vulnerability?
Exploitation requires an authorized attacker with local access to an affected Windows system. The attacker must already hold high privileges, as indicated by the PR:H metric.
Which systems are listed as affected?
The affected software list includes Microsoft Windows 10 and Windows 11, plus Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025.
What impact could successful exploitation have?
A successful local exploit could elevate privileges and has high potential impact on confidentiality, integrity, and availability.