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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-40405

Windows TCP/IP Denial of Service Vulnerability

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Status
Published
Published
Updated
Assigning organization
microsoft

Description

Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Microsoft Windows 11 Version 24H2

  • 10.0.26100.0 to < 10.0.26100.8457affected

Microsoft Windows 11 Version 25H2

  • 10.0.26200.0 to < 10.0.26200.8457affected

Microsoft Windows 11 version 26H1

  • 10.0.28000.0 to < 10.0.28000.2113affected

Microsoft Windows Server 2025

  • 10.0.26100.0 to < 10.0.26100.32860affected

Microsoft Windows Server 2025 (Server Core installation)

  • 10.0.26100.0 to < 10.0.26100.32860affected

References