CVE-2026-34348: Windows Event Logging Service Information Disclosure Vulnerability
Protection mechanism failure in Windows Event Logging Service allows an authorized attacker to disclose information over a network.
Other sources
Windows Event Logging Service Information Disclosure 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 10.0.26100.33158Patch KB5099536 - Upgrade
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Fixed in 10.0.26100.8875Patch KB5101650 - Upgrade
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Fixed in 10.0.22631.7376Patch KB5099414 - Upgrade
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Fixed in 10.0.26200.8875Patch KB5101650 - Upgrade
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Fixed in 10.0.19045.7548Patch KB5099539 - Upgrade
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Fixed in 10.0.28000.2113Patch KB5089548 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7548Patch KB5099539 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9020Patch KB5099538 - Upgrade
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Fixed in 10.0.20348.5386Patch KB5099540 - Upgrade
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Fixed in 10.0.28000.2525Patch KB5101649
Event History
Frequently Asked Questions
What is the severity of CVE-2026-34348?
The severity of CVE-2026-34348 is medium with a CVSS score of 6.5.
How do I fix CVE-2026-34348?
To fix CVE-2026-34348, ensure you apply the latest security updates provided by Microsoft for your operating system.
Who is affected by CVE-2026-34348?
CVE-2026-34348 affects users of Microsoft Windows 10, Windows 11, Windows Server 2019, Windows Server 2022, and Windows Server 2025.
What type of vulnerability is CVE-2026-34348?
CVE-2026-34348 is classified as an information disclosure vulnerability.
Can CVE-2026-34348 be exploited remotely?
Yes, CVE-2026-34348 can be exploited by an authorized attacker over a network.