CVE-2026-85329: Microsoft Account Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Account allows an authorized attacker to elevate privileges locally.
Other sources
Microsoft Account Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- 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
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
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Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
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Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
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Fixed in 10.0.26200.9711Patch KB5127648 - 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 is exposed to this issue?
Systems running the listed Microsoft Windows 10, Windows 11, or supported Windows Server versions are in scope. Exploitation is local, so the attacker must be able to execute on the affected system.
What level of access does an attacker need?
The attacker must already be authorized with low privileges on the target system. No user interaction is required, but exploitation has high attack complexity because it relies on a race condition involving a shared resource.
What is the potential impact after successful exploitation?
A successful attacker can elevate privileges locally. The supplied severity vector indicates potential high impact to confidentiality, integrity, and availability.