CVE-2026-34347: Windows Win32k Elevation of Privilege Vulnerability
Use after free in Windows Win32K - GRFX 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
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Fixed in 10.0.17763.8755Patch KB5087538 - Upgrade
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Fixed in 10.0.20348.5139Fixed in 10.0.20348.5074Patch KB5087424 - Upgrade
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Fixed in 6.3.9600.23181Patch KB5087471 - Upgrade
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Fixed in 6.2.9200.26079Patch KB5087470 - Upgrade
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Fixed in 10.0.14393.9140Patch KB5087537 - Upgrade
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Fixed in 10.0.28000.2113Patch KB5089548 - Upgrade
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Fixed in 10.0.26100.32860Fixed in 10.0.26100.32772Patch KB5087423 - Upgrade
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Fixed in 10.0.26100.8457Fixed in 10.0.26100.8390Patch KB5089466 - Upgrade
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Fixed in 10.0.22631.7219Patch KB5093998 - Upgrade
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Fixed in 10.0.25398.2330Patch KB5087541 - Upgrade
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Fixed in 10.0.22631.7079Patch KB5087420 - Upgrade
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Fixed in 10.0.26200.8457Fixed in 10.0.26200.8390Patch KB5089466 - Upgrade
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Fixed in 10.0.19045.7417Patch KB5094127 - Upgrade
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Fixed in 10.0.19044.7291Patch KB5087544
Event History
Frequently Asked Questions
What is the severity of CVE-2026-34347?
CVE-2026-34347 is classified as an elevation of privilege vulnerability within Windows Win32K.
Who is affected by CVE-2026-34347?
CVE-2026-34347 affects various versions of Microsoft Windows including Windows 10, Windows Server 2019, and Windows Server 2022.
How do I fix CVE-2026-34347?
To fix CVE-2026-34347, users should apply the relevant patches provided by Microsoft for their affected Windows version.
What is CVE-2026-34347?
CVE-2026-34347 is a vulnerability that allows an authorized attacker to elevate privileges locally through a use-after-free condition in Windows Win32K.
Can CVE-2026-34347 be exploited remotely?
No, CVE-2026-34347 requires local access for exploitation, meaning the attacker must have physical or logical access to the targeted system.