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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally."}], "id": "CVE-2026-32070", "lastModified": "2026-04-17T15:10:35.607", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "secure@microsoft.com", "type": "Secondary"}]}, "published": "2026-04-14T18:17:07.203", "references": [{"source": "secure@microsoft.com", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32070"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "secure@microsoft.com", "type": "Secondary"}]}

{}

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"matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Windows Server 2019", "source": "cna", "vendor": "Microsoft"}, "product": "windows_server_2019", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[10.0.17763.0,10.0.17763.8644)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Windows Server 2019 (Server Core installation)", "source": "cna", "vendor": "Microsoft"}, "product": "windows_server_2019_(server_core_installation)", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[10.0.20348.0,10.0.20348.5020)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Windows Server 2022", "source": "cna", "vendor": "Microsoft"}, "product": "windows_server_2022", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[10.0.25398.0,10.0.25398.2274)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Windows Server 2022, 23H2 Edition (Server Core installation)", "source": "cna", "vendor": "Microsoft"}, "product": "windows_server_2022,_23h2_edition_(server_core_installation)", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[10.0.26100.0,10.0.26100.32690)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Windows Server 2025", "source": "cna", "vendor": "Microsoft"}, "product": "windows_server_2025", "vendor": "microsoft"}, {"configurations": [{"platform": ["x64-based_systems"], "status": "affected", "versions": {"scheme": "generic", "value": "[10.0.26100.0,10.0.26100.32690)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Windows Server 2025 (Server Core installation)", "source": "cna", "vendor": "Microsoft"}, "product": "windows_server_2025_(server_core_installation)", "vendor": "microsoft"}], "analysis": {"en": {"generated_at": "2026-04-14T19:49:31.088086+00:00", "value": {"mitigation_remediation": ["Install the latest Microsoft security update that fixes CVE-2026-32070 using Windows Update or the Microsoft Update Catalog.", "Verify that the Common Log File System driver version matches the patched version provided by Microsoft.", "If no patch is yet available, consider disabling logging features that depend on the vulnerable driver until a fix is released.", "Restrict local user accounts to the minimum privileges required and delete unnecessary accounts.", "Continuously monitor the system for signs of privilege escalation or abnormal changes to critical files or registry entries."], "summary": {"action": "Apply patch", "impact": "Local privilege escalation"}, "threat_synthesis": {"affected_systems": "Affected installations include Microsoft Windows\u00a010 releases from version\u00a01607,\u00a01809,\u00a021H2, and\u00a022H2; Microsoft Windows\u00a011 editions\u00a023H2,\u00a024H2,\u00a025H2,\u00a022H3, and\u00a026H1. The vulnerability also impacts Windows Server\u202f2012 through Server\u202f2025, including all common installations and core variants.", "description_and_impact": "The flaw is a use\u2011after\u2011free in the Windows Common Log File System driver. An attacker who has local user authority can force a released object to be reused, creating an execution path that runs arbitrary code with SYSTEM privileges. This directly compromises the confidentiality, integrity, and availability of the affected host by allowing the attacker to modify system files, install malware, or take full control of the operating system.", "risk_and_exploitability": "The CVSS score of\u00a07.0 indicates a medium\u2011to\u2011high severity. No EPSS score is currently available and the vulnerability is not listed in the CISA KEV catalog, suggesting that public exploitation has not yet been observed. The likely attack vector is local: an authenticated user must trigger the use\u2011after\u2011free within the Common Log File System driver to gain SYSTEM privileges."}}}}, "created": "2026-04-15T14:45:03.395656+00:00", "updated": "2026-04-15T20:45:06.112521+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$windows_10_1607", "microsoft$PRODUCT$windows_10_1809", "microsoft$PRODUCT$windows_10_21h2", "microsoft$PRODUCT$windows_10_22h2", "microsoft$PRODUCT$windows_11_22h3", "microsoft$PRODUCT$windows_11_23h2", "microsoft$PRODUCT$windows_11_24h2", "microsoft$PRODUCT$windows_11_25h2", "microsoft$PRODUCT$windows_11_26h1", "microsoft$PRODUCT$windows_server_2012", "microsoft$PRODUCT$windows_server_2012_(server_core_installation)", "microsoft$PRODUCT$windows_server_2012_r2", "microsoft$PRODUCT$windows_server_2012_r2_(server_core_installation)", "microsoft$PRODUCT$windows_server_2016", "microsoft$PRODUCT$windows_server_2016_(server_core_installation)", "microsoft$PRODUCT$windows_server_2019", "microsoft$PRODUCT$windows_server_2019_(server_core_installation)", "microsoft$PRODUCT$windows_server_2022", "microsoft$PRODUCT$windows_server_2022,_23h2_edition_(server_core_installation)", "microsoft$PRODUCT$windows_server_2025", "microsoft$PRODUCT$windows_server_2025_(server_core_installation)"]}