{"id":"CVE-2021-26734","aliases":["EUVD-2021-13521","GHSA-r4fj-mm48-prvv"],"status":"published","title":"Junction Delete leading to elevation of privilege","description":"Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation. A local adversary may be able to delete folders in an elevated context.","severity":{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00154,"percentile":0.04592,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2023-10-23T13:18:36Z","modified":"2026-06-17T03:43:44Z","products":[{"vendor":"zscaler","product":"client connector"},{"vendor":"zscaler","product":"client_connector"}],"references":[{"url":"https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2021","tags":["x_transferred","Release Notes"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26734"},{"url":"https://github.com/advisories/GHSA-r4fj-mm48-prvv"}],"sources":{"cve":[{"id":"CVE-2021-26734","title":"Junction Delete leading to elevation of privilege","description":"Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation. A local adversary may be able to delete folders in an elevated context.\n\n\n\n\n\n","status":"published","published":"2023-10-23T13:18:36.569Z","modified":"2024-09-17T13:46:22.72Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:32:57.368269Z"}],"euvd":[{"id":"EUVD-2021-13521","description":"Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation. A local adversary may be able to delete folders in an elevated context.\n\n\n\n\n\n","status":"published","published":"2023-10-23T13:18:36Z","modified":"2024-09-17T13:46:22Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:28:22.305755Z"}],"ghsa":[{"id":"GHSA-r4fj-mm48-prvv","title":"Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled...","description":"Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation. A local adversary may be able to delete folders in an elevated context.\n\n\n\n\n\n","status":"published","published":"2023-10-23T15:30:24Z","modified":"2024-04-04T08:52:57Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:57:02.541362Z"}],"nvd":[{"id":"CVE-2021-26734","description":"Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation. A local adversary may be able to delete folders in an elevated context.\n\n\n\n\n\n","status":"published","published":"2023-10-23T14:15:08.927Z","modified":"2026-06-17T03:43:44.97Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:07:07.764332Z"}]}}