CVE-2026-56181
Windows Network Address Translation (NAT) Spoofing vulnerability
MSRC advisory July 14, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-56181
- Affected products
- Windows Network Address Translation (NAT) Spoofing · Microsoft Windows Network Address Translation (NAT) Spoofing · Microsoft
What happened
Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized attacker to perform spoofing over an adjacent network.
What it means for your business
Windows Network Address Translation (NAT) Spoofing vulnerability (CVE-2026-56181) was added to Microsoft’s security update guidance. Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized attacker to perform spoofing over an adjacent network. If you need help checking exposure, call (864) 335-9223.
Sources
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