CVE-2026-41089
Windows Netlogon Remote Code Execution Vulnerability
- Published
- May 12, 2026
- Updated
- Aug 10, 2026
- Assigning CNA
- microsoft
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 61.4%
- Model date
- Oct 17, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network.
Sources
CVE-2026-41089 PoC — Netlogon CLDAP stack buffer overflow (CVSS 9.8 CRITICAL)
CVE-2026-41089
- CVE-2026-41089-LongLogonDetection
CVE-2026-41089 checker: unauthenticated, non-destructive detection for the Netlogon CLDAP stack buffer overflow (CVSS 9.8). Reports whether a domain controller's domain is long enough to crash, without sending the overflow. The binary-verified analysis the public PoCs got wrong.
Technical analysis and Proof-of-Concept (PoC) for CVE-2026-41089, a critical unauthenticated Remote Code Execution (RCE) vulnerability in the Windows Netlogon service affecting Domain Controllers.
Responsible use
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