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CVE PROGRAM SOURCE RECORD8.3 High

CVE-2026-56181

Windows Network Address Translation (NAT) Spoofing Vulnerability

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Status
Published
Published
Updated
Assigning organization
microsoft

Description

Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized attacker to perform spoofing over an adjacent 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 < 10.0.26100.8875affected

Microsoft Windows 11 Version 25H2

  • 10.0.26200.0 to < 10.0.26200.8875affected

Microsoft Windows 11 version 26H1

  • 10.0.28000.0 to < 10.0.28000.2525affected

Microsoft Windows Server 2025

  • 10.0.26100.0 to < 10.0.26100.33158affected

Microsoft Windows Server 2025 (Server Core installation)

  • 10.0.26100.0 to < 10.0.26100.33158affected

References