CVE-2026-35420

{"id": "CVE-2026-35420", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2026-05-12T18:17:12.557", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35420", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-122"}]}], "descriptions": [{"lang": "en", "value": "Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally."}], "lastModified": "2026-05-14T18:06:13.470", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A7DF96F8-BA6A-4780-9CA3-F719B3F81074"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DB18C4CE-5917-401E-ACF7-2747084FD36E"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "71D026B8-B196-4369-9AB3-5FCA21E8AA36", "versionEndExcluding": "10.0.14393.9140"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C1926806-B15D-4AF1-967A-7ADA71FF74DC", "versionEndExcluding": "10.0.17763.8755"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "10060868-96D5-47E4-8FEB-80A79DCC1134", "versionEndExcluding": "10.0.20348.5074"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E3F26150-16EA-4D34-8BE9-2EE7C745D707", "versionEndExcluding": "10.0.25398.2330"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9ABAB3B9-28AF-4278-8E78-E1191B1AFC0C", "versionEndExcluding": "10.0.26100.32772"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}