{"api_version":"1","generated_at":"2026-07-23T15:05:05+00:00","cve":"CVE-2021-31727","urls":{"html":"https://cve.report/CVE-2021-31727","api":"https://cve.report/api/cve/CVE-2021-31727.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-31727","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-31727"},"summary":{"title":"CVE-2021-31727","description":"Incorrect access control in zam64.sys, zam32.sys in MalwareFox AntiMalware 2.74.0.150 where IOCTL's 0x80002014, 0x80002018 expose unrestricted disk read/write capabilities respectively. 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A non-privileged process can open a handle to \\.\\ZemanaAntiMalware, register with the driver using IOCTL 0x80002010 and send these IOCTL's to escalate privileges by overwriting the boot sector or overwriting critical code in the pagefile."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://github.com/irql0/CVE-2021-31728/blob/master/CVE-2021-31727.md","url":"https://github.com/irql0/CVE-2021-31728/blob/master/CVE-2021-31727.md"}]}},"nvd":{"publishedDate":"2021-05-17 13:15:00","lastModifiedDate":"2022-07-12 17:42:00","problem_types":["NVD-CWE-Other"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:C/I:C/A:C","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE","baseScore":7.2},"severity":"HIGH","exploitabilityScore":3.9,"impactScore":10,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:malwarefox:antimalware:2.74.0.150:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"31727","Ordinal":"207019","Title":"CVE-2021-31727","CVE":"CVE-2021-31727","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"31727","Ordinal":"1","NoteData":"Incorrect access control in zam64.sys, zam32.sys in MalwareFox AntiMalware 2.74.0.150 where IOCTL's 0x80002014, 0x80002018 expose unrestricted disk read/write capabilities respectively. A non-privileged process can open a handle to \\.\\ZemanaAntiMalware, register with the driver using IOCTL 0x80002010 and send these IOCTL's to escalate privileges by overwriting the boot sector or overwriting critical code in the pagefile.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"31727","Ordinal":"2","NoteData":"2021-05-17","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"31727","Ordinal":"3","NoteData":"2021-05-17","Type":"Other","Title":"Modified"}]}}}