CVE-2026-81354: Windows Hello Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Hello allows an authorized attacker to elevate privileges locally.
Other sources
Windows Hello 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 10.0.26100.9445Patch KB5124008 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7582Patch KB5122880 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.2954Patch KB5124012 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7725Patch KB5122878 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9445Patch KB5124008 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19045.7725Patch KB5122878 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9245Patch KB5122876
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must already be authorized on the affected system and be able to execute an exploit locally. It is not described as remotely exploitable or requiring user interaction.
What is the likely impact of successful exploitation?
Successful exploitation can elevate the attacker's privileges on the local system. The supplied severity vector indicates high impact to confidentiality, integrity, and availability, with scope changed.
Which systems are identified as affected?
The listed affected products are Microsoft Windows 10, Microsoft Windows 11, and Microsoft Windows Server 2019.