{"id":"CVE-2026-56181","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-56181","summary":"Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized attacker to perform spoofing over an adjacent network.","details":"Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized attacker to perform spoofing over an adjacent network.","published":"2026-07-14T18:18:24.793","modified":"2026-07-22T16:18:26.147","cvss":{"score":8.3,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H"},"epss":{"score":0.00276,"percentile":0.19467,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"FIX","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56181"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-07-22T16:18:26.147"}}