CVE-2026-83647: Windows Active Directory Domain Services Denial of Service Vulnerability
Out-of-bounds read in Active Directory Domain Services allows an unauthorized attacker to deny service over a network.
Other sources
Windows Active Directory Domain Services Denial of Service 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 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
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Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An unauthorized attacker can exploit it remotely over a network. The vector is network-based, requires low attack complexity, and does not require privileges or user interaction.
What is the expected impact?
Successful exploitation can deny service in Active Directory Domain Services. The provided data indicates availability impact only, with no stated confidentiality or integrity impact.
Which systems should be prioritized for review?
Review systems running Active Directory Domain Services, particularly deployments on the listed Windows 10, Windows 11, Windows Server 2012 R2, Server 2016, Server 2019, Server 2022, and Server 2025 platforms.