{"api_version":"1","generated_at":"2026-07-23T13:44:41+00:00","cve":"CVE-2021-37617","urls":{"html":"https://cve.report/CVE-2021-37617","api":"https://cve.report/api/cve/CVE-2021-37617.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-37617","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-37617"},"summary":{"title":"CVE-2021-37617","description":"The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. The Nextcloud Desktop Client invokes its uninstaller script when being installed to make sure there are no remnants of previous installations. In versions 3.0.3 through 3.2.4, the Client searches the `Uninstall.exe` file in a folder that can be written by regular users. This could lead to a case where a malicious user creates a malicious `Uninstall.exe`, which would be executed with administrative privileges on the Nextcloud Desktop Client installation. This issue is fixed in Nextcloud Desktop Client version 3.3.0. As a workaround, do not allow untrusted users to create content in the `C:\\` system folder and verify that there is no malicious `C:\\Uninstall.exe` file on the system.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2021-08-18 18:15:00","updated_at":"2022-10-25 16:18:00"},"problem_types":["CWE-427"],"metrics":[],"references":[{"url":"https://github.com/nextcloud/desktop/pull/3497","name":"https://github.com/nextcloud/desktop/pull/3497","refsource":"MISC","tags":[],"title":"Run legacy uninstall exe in a secure way by allexzander · Pull Request #3497 · nextcloud/desktop · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v","name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v","refsource":"CONFIRM","tags":[],"title":"Untrusted Search Path in Nextcloud Desktop Client · Advisory · nextcloud/security-advisories · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://hackerone.com/reports/1240749","name":"https://hackerone.com/reports/1240749","refsource":"MISC","tags":[],"title":"HackerOne","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-37617","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-37617","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"37617","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"nextcloud","cpe5":"desktop","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2021-37617","STATE":"PUBLIC","TITLE":"Untrusted Search Path in Nextcloud Desktop Client"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"security-advisories","version":{"version_data":[{"version_value":">= 3.0.3 , <= 3.2.4"}]}}]},"vendor_name":"nextcloud"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. The Nextcloud Desktop Client invokes its uninstaller script when being installed to make sure there are no remnants of previous installations. In versions 3.0.3 through 3.2.4, the Client searches the `Uninstall.exe` file in a folder that can be written by regular users. This could lead to a case where a malicious user creates a malicious `Uninstall.exe`, which would be executed with administrative privileges on the Nextcloud Desktop Client installation. This issue is fixed in Nextcloud Desktop Client version 3.3.0. As a workaround, do not allow untrusted users to create content in the `C:\\` system folder and verify that there is no malicious `C:\\Uninstall.exe` file on the system."}]},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-426: Untrusted Search Path"}]}]},"references":{"reference_data":[{"name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v","refsource":"CONFIRM","url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v"},{"name":"https://github.com/nextcloud/desktop/pull/3497","refsource":"MISC","url":"https://github.com/nextcloud/desktop/pull/3497"},{"name":"https://hackerone.com/reports/1240749","refsource":"MISC","url":"https://hackerone.com/reports/1240749"}]},"source":{"advisory":"GHSA-6q2w-v879-q24v","discovery":"UNKNOWN"}},"nvd":{"publishedDate":"2021-08-18 18:15:00","lastModifiedDate":"2022-10-25 16:18:00","problem_types":["CWE-427"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.3,"baseSeverity":"HIGH"},"exploitabilityScore":1.3,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:M/Au:N/C:P/I:P/A:P","accessVector":"LOCAL","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":4.4},"severity":"MEDIUM","exploitabilityScore":3.4,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0.3","versionEndExcluding":"3.3.0","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"37617","Ordinal":"213217","Title":"CVE-2021-37617","CVE":"CVE-2021-37617","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"37617","Ordinal":"1","NoteData":"The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. The Nextcloud Desktop Client invokes its uninstaller script when being installed to make sure there are no remnants of previous installations. In versions 3.0.3 through 3.2.4, the Client searches the `Uninstall.exe` file in a folder that can be written by regular users. This could lead to a case where a malicious user creates a malicious `Uninstall.exe`, which would be executed with administrative privileges on the Nextcloud Desktop Client installation. This issue is fixed in Nextcloud Desktop Client version 3.3.0. As a workaround, do not allow untrusted users to create content in the `C:\\` system folder and verify that there is no malicious `C:\\Uninstall.exe` file on the system.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"37617","Ordinal":"2","NoteData":"2021-08-18","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"37617","Ordinal":"3","NoteData":"2021-08-18","Type":"Other","Title":"Modified"}]}}}