CVE-2026-69478
Windows Device Association Service Elevation of Privilege Vulnerability
Description
Heap-based buffer overflow in Windows Device Association Service allows an authorized attacker to elevate privileges locally.
In plain language
AI Act nowCVE-2026-69478 is a Windows local security bug that could let an attacker raise their access level on affected Windows 10/11 and Windows Server systems; you should act because it’s a serious privilege-escalation issue and fixes are available.
CVE-2026-69478 is a Windows Device Association Service elevation of privilege issue (CWE-122) where a heap-based buffer overflow can be triggered by an authorized local attacker to gain higher privileges; fixed Windows builds are available for each supported release listed.
What to do now
- Check whether you run any of the affected systems: Windows 10, Windows 11, or Windows Server (2016/2019/2022/2025).
- Verify your installed Windows build/update level.
- Upgrade to the fixed Windows version for your exact release:
- Windows 10 fixed in 10.0.14393.9512 (or 10.0.17763.9245, 10.0.19044.7725, or 10.0.19045.7725)
- Windows 11 fixed in 10.0.22631.7582 (or 10.0.26100.9445, 10.0.26200.9445, or 10.0.28000.2954)
- Windows Server 2016 fixed in 10.0.14393.9512
- Windows Server 2019 fixed in 10.0.17763.9245
- Windows Server 2022 fixed in 10.0.20348.5622
- Windows Server 2025 fixed in 10.0.26100.33438
- If you can’t patch right away, limit local access to those devices (reduce who can log on locally) and treat any suspicious local activity as a potential security incident until patched.
CVSS Vector Breakdown
AV:LAttack VectorAC:LAttack ComplexityPR:LPrivileges RequiredUI:NUser InteractionS:UScopeC:HConfidentialityI:HIntegrityA:HAvailabilityWeaknesses
Affected Products
Exploitability
Attack Graph
Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.
MITRE ATT&CK
1 techniqueReferences
- Microsoft Patch Tuesday for September 2026 — Snort rules and prominent vulnerabilitiesen·Cisco Talos· Exploited Windows zero-day
- Microsoft and Adobe Patch Tuesday, September 2026 Security Update Reviewen-us·Qualys Security Blog· Exploited Microsoft Exchange Server Qualys
- Microsoft September 2026 Patch Tuesday fixes 966 flaws, 2 zero-daysen-us·BleepingComputer· Exploited Windows patch-tuesday
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