CVE-2026-33826

HighCVSS 8.0/10Last modified Jul 24, 2026

Description

Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.

Metrics

CVSS 3.1 8.0/10CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-20

Affected software

Vendor	Product	Versions
Microsoft	Windows Server 2012 R2	>= 6.3.9600.0, < 6.3.9600.23132
Microsoft	Windows Server 2012 R2 (Server Core installation)	>= 6.3.9600.0, < 6.3.9600.23132
Microsoft	Windows Server 2016	>= 10.0.14393.0, < 10.0.14393.9060
Microsoft	Windows Server 2016 (Server Core installation)	>= 10.0.14393.0, < 10.0.14393.9060
Microsoft	Windows Server 2019	>= 10.0.17763.0, < 10.0.17763.8644
Microsoft	Windows Server 2019 (Server Core installation)	>= 10.0.17763.0, < 10.0.17763.8644
Microsoft	Windows Server 2022	>= 10.0.20348.0, < 10.0.20348.5020
Microsoft	Windows Server 2022, 23H2 Edition (Server Core installation)	>= 10.0.25398.0, < 10.0.25398.2274
Microsoft	Windows Server 2025	>= 10.0.26100.0, < 10.0.26100.32690
Microsoft	Windows Server 2025 (Server Core installation)	>= 10.0.26100.0, < 10.0.26100.32690

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33826Vendor Advisory

Timeline

Published: Apr 14, 2026
Last modified: Jul 24, 2026
NVD status: Analyzed

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