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8.0
Unauthorized Code Execution in Windows Active Directory
CVE-2026-33826
Summary
An attacker on a connected network can run malicious code on a Windows Active Directory server if they send a specially crafted request. This could allow them to access sensitive data or disrupt the directory service. IT should update Windows to the latest patches to mitigate this risk.
Original title
Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.
Original description
Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.
nvd CVSS3.1
8.0
Vulnerability type
CWE-20
Improper Input Validation
Published: 14 Apr 2026 · Updated: 14 Apr 2026 · First seen: 14 Apr 2026