CVE-2026-69428: Windows LDAP - Lightweight Directory Access Protocol Denial of Service Vulnerability
Out-of-bounds read in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network.
Other sources
Windows LDAP - Lightweight Directory Access Protocol 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 6.3.9600.23397Patch KB5123066 - Upgrade
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Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
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Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
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Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
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Fixed in 10.0.26200.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.28000.2954Patch KB5124012 - Upgrade
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Fixed in 10.0.22631.7582Patch KB5122880 - Upgrade
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Fixed in 10.0.26100.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
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Fixed in 10.0.17763.9245Patch KB5122876 - Upgrade
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Fixed in 10.0.19044.7725Patch KB5122878 - Upgrade
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Fixed in 10.0.19045.7725Patch KB5122878
Event History
Frequently Asked Questions
Which systems should be prioritized for review?
The affected software list includes Microsoft Windows 10, Windows 11, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025. Systems running LDAP services on these platforms should be assessed first because exploitation is network-based.
Does exploitation require credentials or user interaction?
No. The supplied CVSS vector indicates network attack access with low attack complexity, no privileges required, and no user interaction required.
What is the expected security impact?
The reported impact is denial of service, with availability affected while confidentiality and integrity are not affected according to the supplied CVSS metrics.