CVE-2026-69424: Windows Distributed File System (DFS) Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Distributed File System (DFS) allows an authorized attacker to elevate privileges locally.
Other sources
Windows Distributed File System (DFS) 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 10.0.14393.9512Patch KB5123099 - Upgrade
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Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
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Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
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Fixed in 6.3.9600.23397Patch KB5123066 - Upgrade
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Fixed in 10.0.28000.2954Patch KB5124012 - Upgrade
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Fixed in 10.0.26200.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.26100.9445Patch KB5124008 - Upgrade
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Fixed in 10.0.26100.33438Patch KB5122871 - 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 10.0.17763.9245Patch KB5122876
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The attacker must already be authorized on the affected Windows system and have local access. The vulnerability does not indicate remote exploitation or user interaction as prerequisites.
What is the potential impact after successful exploitation?
A successful exploit can elevate the attacker's privileges on the local system. The supplied severity vector indicates high impact to confidentiality, integrity, and availability.
Which systems should be prioritized for review?
Review systems running the listed Microsoft Windows 10, Windows 11, or Windows Server releases: 2012, 2012 R2, 2016, 2019, 2022, and 2025. Systems where lower-privileged authorized users can log on locally are particularly relevant because exploitation requires local authorized access.