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HydraSoft edited this page Jul 28, 2026 · 2 revisions

CVE-2026-41089: Critical Windows Netlogon RCE

Welcome to the technical reference wiki for CVE-2026-41089, an extremely critical vulnerability residing within the Windows Netlogon authentication mechanism.

This database is designed for enterprise security teams, threat hunters, and system administrators looking to understand the mechanics of this flaw, assess their exposure, and validate defensive posture across Active Directory environments.

Executive Summary

  • Identifier: CVE-2026-41089
  • Impact: Unauthenticated Remote Code Execution (RCE)
  • Severity: Critical (CVSS v3.1: 9.8)
  • Affected Service: Windows Netlogon (LSASS process space)
  • Weakness Class: CWE-121 (Stack-based Buffer Overflow)

Core Impact Philosophy

"Securing the identity plane is the cornerstone of enterprise defense."

Because this vulnerability operates over the network, requires no authentication, and demands zero user interaction, it represents an immediate threat vector for Active Directory environments. A successful exploit allows arbitrary execution in the context of the Local System, making it a critical focus area for immediate patching and threat hunting operations.

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