Vulnerability · NVD
CVE-2026-56181
CVE-2026-56181 : high severity (CVSS 8.3). No tracked catalog app is linked to this CVE.
- Severity (CVSS)
- 8.3
- Exploitation
- 0.3 %
- Tracked apps
- 0
- Still exposed
- 0
NVD scale
EPSS, predicted over 30 days
Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized attacker to perform spoofing over an adjacent network.
Attack vector : Adjacent network
No privileges required
No user interaction
Show raw CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS
0.28%
exploit very unlikely
percentile 17.8%
OS versions that fix this CVE
This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.
- Windows Server 2025 Fixed in 10.0.26100.33158
- Windows 11 26H1 · 2026-H1 Fixed in 10.0.28000.2525
- Windows 11 25H2 · 2025-H2 Fixed in 10.0.26200.8875
- Windows 11 24H2 · 2024-H2 Fixed in 10.0.26100.8875
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