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HIGH · 8.0

CVE-2026-33826

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

Vulnerability Description

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

CVSS Score

8.0

HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
MicrosoftWindows Server 2012r2
MicrosoftWindows Server 2016< 10.0.14393.9060
MicrosoftWindows Server 2019< 10.0.17763.8644
MicrosoftWindows Server 2022< 10.0.20348.5020
MicrosoftWindows Server 2022 23H2< 10.0.25398.2274
MicrosoftWindows Server 2025< 10.0.26100.32690

Related Weaknesses (CWE)

CWE-20

References

FAQ

What is CVE-2026-33826?

CVE-2026-33826 is a vulnerability with a CVSS score of 8.0 (HIGH). Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.

How severe is CVE-2026-33826?

CVE-2026-33826 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-33826?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23H2.