{"id":"CVE-2023-28804","aliases":["EUVD-2023-32439","GHSA-h7x8-97pc-7qrv"],"status":"published","title":"Linux ZCC allows unsigned updates, allowing elevated Code Execution","description":"An Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows replacing binaries.This issue affects Linux Client Connector: before 1.4.0.105","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00285,"percentile":0.21138,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-347"],"published":"2023-10-23T13:33:19Z","modified":"2026-06-17T05:48:48Z","products":[{"vendor":"zscaler","product":"client connector"},{"vendor":"zscaler","product":"client_connector"}],"references":[{"url":"https://help.zscaler.com/client-connector/client-connector-app-release-summary-2023","tags":["x_transferred","Release Notes"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28804"},{"url":"https://github.com/advisories/GHSA-h7x8-97pc-7qrv"}],"sources":{"cve":[{"id":"CVE-2023-28804","title":"Linux ZCC allows unsigned updates, allowing elevated Code Execution","description":"An Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows replacing binaries.This issue affects Linux Client Connector: before 1.4.0.105","status":"published","published":"2023-10-23T13:33:19.903Z","modified":"2024-10-17T15:09:55.8Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:35:32.376766Z"}],"euvd":[{"id":"EUVD-2023-32439","description":"An Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows replacing binaries.This issue affects Linux Client Connector: before 1.4.0.105","status":"published","published":"2023-10-23T13:33:19Z","modified":"2024-10-17T15:09:55Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high"}],"updated_at":"2026-11-03T00:27:34.339903Z"}],"ghsa":[{"id":"GHSA-h7x8-97pc-7qrv","title":"An Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on...","description":"An Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows replacing binaries.This issue affects Linux Client Connector: before 1.4.0.105","status":"published","published":"2023-10-23T15:30:24Z","modified":"2024-04-11T21:07:31Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:57:07.421443Z"}],"nvd":[{"id":"CVE-2023-28804","description":"An Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows replacing binaries.This issue affects Linux Client Connector: before 1.4.0.105","status":"published","published":"2023-10-23T14:15:09.687Z","modified":"2026-06-17T05:48:48.483Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:08:39.058878Z"}]}}