CVE-2026-65678: Windows Win32k Elevation of Privilege Vulnerability
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
Other sources
Windows Win32k 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 10.0.14393.9418Patch KB5120418 - Upgrade
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Fixed in 10.0.28000.2704Patch KB5121000 - Upgrade
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Fixed in 10.0.20348.5499Fixed in 10.0.20348.5440Patch KB5120229 - Upgrade
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Fixed in 10.0.19044.7663Patch KB5120249 - Upgrade
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Fixed in 10.0.17763.9115Patch KB5120238 - Upgrade
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Fixed in 10.0.22631.7517Patch KB5120240 - Upgrade
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Fixed in 10.0.26100.9168Fixed in 10.0.26100.9106Patch KB5120994 - Upgrade
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Fixed in 10.0.26100.9168Fixed in 10.0.26000.9106Patch KB5120994 - Upgrade
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Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
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Fixed in 10.0.26200.9168Fixed in 10.0.26100.9106Patch KB5120994 - Upgrade
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Fixed in 10.0.19045.7663Patch KB5120249
Event History
Frequently Asked Questions
What is the severity of CVE-2026-65678?
CVE-2026-65678 has a severity rating of high, specifically rated at 7.
What does CVE-2026-65678 affect?
CVE-2026-65678 affects multiple versions of Microsoft Windows including Windows 10, Windows 11, and various Windows Server editions.
How is CVE-2026-65678 exploited?
CVE-2026-65678 can be exploited by an authorized attacker locally to elevate their privileges due to a use after free vulnerability.
How do I fix CVE-2026-65678?
To fix CVE-2026-65678, ensure that your Microsoft Windows operating system is updated with the latest security patches from Microsoft.
What are the consequences of CVE-2026-65678?
The consequence of CVE-2026-65678 is that it allows an attacker to gain elevated privileges on the affected Windows system.