CVE-2026-26166

{"id": "CVE-2026-26166", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.0, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.0}]}, "published": "2026-04-14T18:16:50.060", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26166", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-415"}]}], "descriptions": [{"lang": "en", "value": "Double free in Windows Shell allows an authorized attacker to elevate privileges locally."}], "lastModified": "2026-04-24T17:38:47.053", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "B33CE091-B873-4C30-BA05-54A8C1839212", "versionEndExcluding": "10.0.22631.6936"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "E3AF28F3-D486-4B88-9E0E-371241024174", "versionEndExcluding": "10.0.22631.6936"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "94EB36C7-1FF2-4B44-AD91-F3540F09393E", "versionEndExcluding": "10.0.26100.8246"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "14B23C3F-C8AC-491A-BCA5-EB6982C8F9E9", "versionEndExcluding": "10.0.26100.8246"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "361B5DAB-8D1F-45D7-A33C-F49EBA56B5F8", "versionEndExcluding": "10.0.26200.8246"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "ADC6CE99-AB5D-4DD5-82A9-892366C4B2FD", "versionEndExcluding": "10.0.26200.8246"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": "690E74A8-E72C-47B6-96EB-37C48D69A635", "versionEndExcluding": "10.0.28000.1836"}, {"criteria": "cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "13A01FA1-08DC-4E33-9FFC-AB4BCD9634CA", "versionEndExcluding": "10.0.28000.1836"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DC6837B7-5DFD-4AF7-B436-3C6FEF48BA60", "versionEndExcluding": "10.0.20348.5020"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "55A1F3AB-5299-4495-9A73-FDA23C6FD88D", "versionEndExcluding": "10.0.25398.2274"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ADF41A14-B9DA-4788-82A8-74DCDCD090E1", "versionEndExcluding": "10.0.26100.32690"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}