SB2026051325 - Remote code execution in Microsoft Windows Netlogon

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Main Vulnerability Database SB2026051325

SB2026051325 - Remote code execution in Microsoft Windows Netlogon

Published: May 13, 2026 Updated: June 23, 2026

Security Bulletin ID SB2026051325
CSH Severity
Critical
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Code execution

Breakdown by Severity

Critical 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Stack-based buffer overflow (CVE-ID: CVE-2026-41089)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/U:Red


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Windows Netlogon. A remote unauthenticated attacker can send specially crafted network request to a domain controller server, trigger a stack-based buffer overflow and execute arbitrary code with SYSTEM privileges. 

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system and the entire AD.


Remediation

Install update from vendor's website.

References