CVE-2026-40402

{"id": "CVE-2026-40402", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.3, "attackVector": "LOCAL", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.5}]}, "published": "2026-05-12T18:17:18.000", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40402", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally."}], "lastModified": "2026-05-15T15:23:40.807", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "D039A905-2FE4-4A10-85BF-175947E6A017", "versionEndExcluding": "10.0.22631.7079"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "4904DDBD-B183-4AA2-ABD6-47BAF1A28861", "versionEndExcluding": "10.0.22631.7079"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "10060868-96D5-47E4-8FEB-80A79DCC1134", "versionEndExcluding": "10.0.20348.5074"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}