{"api_version":"1","generated_at":"2026-07-23T14:54:26+00:00","cve":"CVE-2021-34987","urls":{"html":"https://cve.report/CVE-2021-34987","api":"https://cve.report/api/cve/CVE-2021-34987.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-34987","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-34987"},"summary":{"title":"CVE-2021-34987","description":"This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.5.1 (49187). An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the HDAudio virtual device. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-14969.","state":"PUBLIC","assigner":"zdi-disclosures@trendmicro.com","published_at":"2022-07-15 19:15:00","updated_at":"2022-07-22 13:58:00"},"problem_types":["CWE-120"],"metrics":[],"references":[{"url":"https://kb.parallels.com/en/125013","name":"N/A","refsource":"N/A","tags":[],"title":"KB Parallels: Parallels Desktop Security Updates","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-22-386/","name":"N/A","refsource":"N/A","tags":[],"title":"ZDI-22-386 | Zero Day Initiative","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-34987","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34987","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"34987","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"parallels","cpe5":"parallels_desktop","cpe6":"16.5.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"macos","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"zdi-disclosures@trendmicro.com","ID":"CVE-2021-34987","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Desktop","version":{"version_data":[{"version_value":"16.5.1 (49187)"}]}}]},"vendor_name":"Parallels"}]}},"credit":"Ben McBride","data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.5.1 (49187). An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the HDAudio virtual device. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-14969."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}]},"references":{"reference_data":[{"url":"https://kb.parallels.com/en/125013","refsource":"MISC","name":"https://kb.parallels.com/en/125013"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-22-386/","refsource":"MISC","name":"https://www.zerodayinitiative.com/advisories/ZDI-22-386/"}]},"impact":{"cvss":{"vectorString":"CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","version":"3.0"}}},"nvd":{"publishedDate":"2022-07-15 19:15:00","lastModifiedDate":"2022-07-22 13:58:00","problem_types":["CWE-120"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH"},"exploitabilityScore":1.5,"impactScore":6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:parallels:parallels_desktop:16.5.1:*:*:*:*:macos:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"34987","Ordinal":"210467","Title":"CVE-2021-34987","CVE":"CVE-2021-34987","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"34987","Ordinal":"1","NoteData":"** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.","Type":"Description","Title":null}]}}}