CVE-2026-33826
Received Received - Intake

Improper Input Validation in Windows AD Enables Remote Code Execution

Publication date: 2026-04-14

Last updated on: 2026-04-17

Assigner: Microsoft Corporation

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

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Meta Information

Published
2026-04-14
Last Modified
2026-04-17
Generated
2026-07-06
AI Q&A
2026-04-14
EPSS Evaluated
2026-07-05
NVD
CVE-2026-33826
EUVD
EUVD-2026-22645

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
microsoft windows_server_2012 r2
microsoft windows_server_2016 to 10.0.14393.9060 (exc)
microsoft windows_server_2019 to 10.0.17763.8644 (exc)
microsoft windows_server_2022 to 10.0.20348.5020 (exc)
microsoft windows_server_2022_23h2 to 10.0.25398.2274 (exc)
microsoft windows_server_2025 to 10.0.26100.32690 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

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Impact Analysis

An attacker exploiting this vulnerability can execute arbitrary code remotely, which can lead to full compromise of the affected system.

  • Remote Code Execution
  • Potential full system compromise
  • High impact on confidentiality, integrity, and availability
Executive Summary

This vulnerability is caused by improper input validation in Windows Active Directory. It allows an authorized attacker to execute code remotely over an adjacent network.

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