CVE-2026-56179

Published Aug 11, 2026

Last updated 12 days ago

Overview

Description
Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized attacker to perform spoofing over an adjacent network.
Source
secure@microsoft.com
NVD status
Analyzed
Products
windows_11_24h2, windows_11_25h2, windows_11_26h1, windows_server_2025

Risk scores

CVSS 3.1

Type
Secondary
Base score
8.3
Impact score
6
Exploitability score
1.6
Vector string
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Severity
HIGH

Weaknesses

secure@microsoft.com
CWE-346

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.