CVEvulnerability
CVE-2026-56181
8.3 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-14
- Last modified
- 2026-07-22
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.3 HIGH — CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-346
Description
Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized attacker to perform spoofing over an adjacent network.
Affected configurations
• microsoft windows 11 24h2 (< 10.0.26100.8875)
• microsoft windows 11 25h2 (< 10.0.26200.8875)
• microsoft windows 11 26h1 (< 10.0.28000.2525)
• microsoft windows server 2025 (< 10.0.26100.33158)
Related
Weakness · CWE (1)
- CWE-346 Origin Validation Error weakness
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56181 Patch, Vendor Advisory