CVE-2026-21255

HIGH

8.8

Description

Improper access control in Windows Hyper-V allows an authorized attacker to bypass a security feature locally.

Details CVE

Score CVSS v3.18.8

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Vecteur d'attaqueLOCAL

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie2/10/2026

Derniere modification2/11/2026

Sourcenvd

Observations honeypot0

Produits affectes

microsoft:windows_10_1607microsoft:windows_10_1809microsoft:windows_10_21h2microsoft:windows_10_22h2microsoft:windows_11_23h2microsoft:windows_11_24h2microsoft:windows_11_25h2microsoft:windows_server_2016microsoft:windows_server_2019microsoft:windows_server_2022microsoft:windows_server_2022_23h2microsoft:windows_server_2025

Faiblesses (CWE)

CWE-284

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21255(secure@microsoft.com)

Correlations IOC

Aucune correlation enregistree

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