{"id":"CVE-2026-59564","title":"An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.","summary":"An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-304"],"published":"2026-08-24","updated":"2026-10-12","sourceUpdated":"2026-10-12T15:10:00.207","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-59564","references":[{"url":"https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026","label":"cve@zscaler.com"}],"tags":["nvd"],"epss":0.00529,"epssPercentile":0.43075,"ingestedAt":"2026-10-12T15:55:08.116Z","slug":"CVE-2026-59564","body":"## Overview\n\nAn authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}