CVE-2026-66322 in Edge

Summary

by MITRE • 08/04/2026

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

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• Responsible: Microsoft
• Reservation: 07/24/2026
• Disclosure: 08/04/2026
• Moderation: accepted
• Entry: VDB-385725
• CPE: ready
• CWE: CWE-285 (confirmed)
• CVSS: 7.3 (VulDB)
• EPSS: 0.00000
• KEV: no
• Activities: very low
• Sector: Transportation, Finance, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-66322
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-66322
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-66322/