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CVE-2026-56179

Windows Network Address Translation (NAT) Spoofing Vulnerability

CVSS 3.1 8.3 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

Historical advisory recorded 30 Oct 2026 18:45:26 UTC. Read the latest advisory.

cve-program · CVE-2026-56179

Published

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

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-56179

Published

Windows Network Address Translation (NAT) Spoofing Vulnerability

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

Source published
11 Aug 2026 17:07:10 UTC
Source modified
30 Oct 2026 17:22:56 UTC
Saved here
30 Oct 2026 18:45:26 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · 8.3 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

ChangeIntel

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Sources read 12 Nov 19:39 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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