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CVE-2026-21255
HIGH
CVSS: 8.8
Published: 2026-02-10
Modified: 2026-06-17
Description
Improper access control in Windows Hyper-V allows an authorized attacker to bypass a security feature locally.
Affected Platforms
Microsoft Windows Server 2016Microsoft Windows 11 25H2Microsoft Windows 10 21H2Microsoft Windows 11 24H2Microsoft Windows Server 2019Microsoft Windows 10 22H2Microsoft Windows Server 2025Microsoft Windows Server 2022Microsoft Windows 10 1809Microsoft Windows 10 1607