Hackers Exploit Critical Windows Netlogon Vulnerability

TL;DR. Threat actors actively exploit a critical Windows Netlogon vulnerability (CVE-2026-41089) for remote code execution on unpatched servers. - The flaw allows unauthenticated attackers to run code with System privileges on Windows domain controllers. - Microsoft patched the Netlogon security defect on May 12, but attackers are now using it in the wild. - Organizations must immediately apply the patch to prevent server compromise and unauthorized access.

• Threat actors are actively exploiting CVE-2026-41089, a critical Windows Netlogon vulnerability.
• The flaw allows unauthenticated remote code execution with System privileges on Windows domain controllers.
• Microsoft issued a patch for the vulnerability on May 12 but did not flag it for likely exploitation at the time.
• The Centre for Cybersecurity Belgium (CCB) has warned organizations about in-the-wild exploitation.
• Organizations are urged to patch immediately to secure their domain control systems.

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