CVE-2026-56181

8.3 HIGH

Published: July 14, 2026 Modified: July 14, 2026

Description

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

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0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Patch Vendor Advisory Exploit Third Party Advisory

Source: secure@microsoft.com

1 reference(s) from NVD

CVSS v3 Score

8.3 / 10.0

Exploitation Status

Not in CISA KEV

CWE-346