CVE-2026-35420: Windows Kernel Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Other sources
Windows Kernel 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 6.3.9600.23181Patch KB5087471 - Upgrade
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Fixed in 6.2.9200.26079Patch KB5087470 - Upgrade
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Fixed in 10.0.26100.32860Fixed in 10.0.26100.32772Patch KB5087423 - Upgrade
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Fixed in 10.0.14393.9140Patch KB5087537 - Upgrade
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Fixed in 10.0.25398.2330Patch KB5087541 - Upgrade
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Fixed in 10.0.20348.5139Fixed in 10.0.20348.5074Patch KB5087424 - Upgrade
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Fixed in 10.0.17763.8755Patch KB5087538
Event History
Frequently Asked Questions
What is the severity of CVE-2026-35420?
CVE-2026-35420 has a high severity rating due to its potential for local elevation of privilege exploits.
How can I mitigate CVE-2026-35420?
To mitigate CVE-2026-35420, apply the latest security patches provided by Microsoft for the affected Windows Server versions.
Which versions of Windows Server are affected by CVE-2026-35420?
CVE-2026-35420 affects multiple versions, including Windows Server 2012, 2016, 2019, 2022, and 2025.
What is the nature of the vulnerability in CVE-2026-35420?
CVE-2026-35420 is a heap-based buffer overflow vulnerability that can enable unauthorized privilege elevation.
Who is impacted by CVE-2026-35420?
Users of the affected Windows Server systems who have unauthorized access may be able to exploit CVE-2026-35420 to escalate their privileges.