vulnerability
Microsoft Windows: CVE-2026-40405: Windows TCP/IP Denial of Service Vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | May 12, 2026 | May 12, 2026 | May 12, 2026 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
May 12, 2026
Added
May 12, 2026
Modified
May 12, 2026
Description
Microsoft Windows: CVE-2026-40405: Windows TCP/IP Denial of Service Vulnerability
Solutions
microsoft-windows-windows_11-24h2-kb5089549microsoft-windows-windows_11-25h2-kb5089549microsoft-windows-windows_11-26h1-kb5089548microsoft-windows-windows_server_2025-24h2-kb5087539
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.