{"api_version":"1","generated_at":"2026-07-23T19:19:22+00:00","cve":"CVE-2021-34986","urls":{"html":"https://cve.report/CVE-2021-34986","api":"https://cve.report/api/cve/CVE-2021-34986.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-34986","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-34986"},"summary":{"title":"CVE-2021-34986","description":"This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.5.0 (49183). An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the Parallels Service. By creating a symbolic link, an attacker can abuse the service to execute a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13932.","state":"PUBLIC","assigner":"zdi-disclosures@trendmicro.com","published_at":"2022-07-15 19:15:00","updated_at":"2022-07-22 14:01:00"},"problem_types":["CWE-367"],"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-22-385/","name":"N/A","refsource":"N/A","tags":[],"title":"ZDI-22-385 | Zero Day Initiative","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-34986","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34986","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"34986","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"parallels","cpe5":"parallels_desktop","cpe6":"16.5.0","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-2021-34986","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Desktop","version":{"version_data":[{"version_value":"16.5.0 (49183)"}]}}]},"vendor_name":"Parallels"}]}},"credit":"say2","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 16.5.0 (49183). An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the Parallels Service. By creating a symbolic link, an attacker can abuse the service to execute a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13932."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition"}]}]},"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-22-385/","refsource":"MISC","name":"https://www.zerodayinitiative.com/advisories/ZDI-22-385/"}]},"impact":{"cvss":{"vectorString":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.0"}}},"nvd":{"publishedDate":"2022-07-15 19:15:00","lastModifiedDate":"2022-07-22 14:01:00","problem_types":["CWE-367"],"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}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:parallels:parallels_desktop:16.5.0:*:*:*:*:macos:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"34986","Ordinal":"210466","Title":"CVE-2021-34986","CVE":"CVE-2021-34986","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"34986","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}]}}}