CVE-2026-84001: Windows Key Distribution Center Denial of Service Vulnerability
Out-of-bounds read in Windows Key Distribution Center allows an unauthorized attacker to deny service over a network.
Other sources
Windows Key Distribution Center Denial of Service Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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Fixed in 6.3.9600.23397Patch KB5123066 - Upgrade
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Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
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Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
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Fixed in 10.0.17763.9245Patch KB5122876 - Upgrade
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Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
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Fixed in 10.0.28000.2954Patch KB5124012 - Upgrade
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Fixed in 10.0.26100.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.26200.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.22631.7582Patch KB5122880 - Upgrade
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Fixed in 10.0.19045.7725Patch KB5122878 - Upgrade
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Fixed in 10.0.19044.7725Patch KB5122878 - Upgrade
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Fixed in 10.0.20348.5622Patch KB5122882
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
The issue is exploitable over the network by an unauthorized attacker. It requires no privileges or user interaction.
What is the expected impact of successful exploitation?
Successful exploitation can deny service in the Windows Key Distribution Center. The provided severity vector indicates no confidentiality or integrity impact, with impact limited to availability.
Which systems are identified as affected?
The affected software list includes Microsoft Windows 10, Windows 11, and Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025.