CVE-2026-33834: Windows Event Logging Service Elevation of Privilege Vulnerability
Improper access control in Windows Event Logging Service allows an authorized attacker to elevate privileges locally.
Other sources
Windows Event Logging Service 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 10.0.14393.9140Patch 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 10.0.26200.8457Fixed in 10.0.26200.8390Patch KB5089466 - Upgrade
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Fixed in 10.0.22631.7079Patch KB5087420 - Upgrade
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Fixed in 10.0.19045.7417Patch KB5094127 - Upgrade
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Fixed in 10.0.19044.7291Patch KB5087544 - 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
Event History
Frequently Asked Questions
What is the severity of CVE-2026-33834?
CVE-2026-33834 has been classified as a critical elevation of privilege vulnerability.
How do I fix CVE-2026-33834?
To fix CVE-2026-33834, update your affected Windows software with the latest security patch from Microsoft.
Which Windows versions are affected by CVE-2026-33834?
CVE-2026-33834 affects various versions of Windows including Windows Server 2016, Windows Server 2012 R2, Windows 10, and Windows 11.
Can CVE-2026-33834 be exploited remotely?
CVE-2026-33834 requires local access for exploitation, as it involves privilege escalation.
What are the potential impacts of CVE-2026-33834 if exploited?
If exploited, CVE-2026-33834 can allow an attacker to gain elevated privileges and potentially control affected systems.