{"id":"CVE-2026-59564","aliases":["EUVD-2026-64860","GHSA-r7wr-wrcm-fj8q"],"status":"published","title":"Authentication bypass between ZCC and client connector portal","description":"An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00529,"percentile":0.45067,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-304"],"published":"2026-08-24T13:39:16Z","modified":"2026-10-12T15:10:00Z","products":[{"vendor":"zscaler","product":"client connector"}],"references":[{"url":"https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59564"},{"url":"https://github.com/advisories/GHSA-r7wr-wrcm-fj8q"}],"sources":{"cve":[{"id":"CVE-2026-59564","title":"Authentication bypass between ZCC and client connector portal","description":"An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.","status":"published","published":"2026-08-24T13:39:16.063Z","modified":"2026-08-25T03:56:08.874Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"cna"}],"cwes":["CWE-304"],"updated_at":"2026-11-02T14:19:58.944663Z"}],"euvd":[{"id":"EUVD-2026-64860","description":"An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.","status":"published","published":"2026-08-24T13:39:16Z","modified":"2026-08-25T03:56:08Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T18:01:33.760029Z"}],"ghsa":[{"id":"GHSA-r7wr-wrcm-fj8q","title":"An authentication bypass issue exists in communications between affected versions of the Zscaler...","description":"An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.","status":"published","published":"2026-08-24T15:31:51Z","modified":"2026-08-24T15:31:57Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-304"],"updated_at":"2026-11-02T15:10:53.487857Z"}],"nvd":[{"id":"CVE-2026-59564","description":"An authentication bypass issue exists in communications between affected versions of the Zscaler Client Connector and the Zscaler Client Connector Portal.","status":"published","published":"2026-08-24T14:16:55.69Z","modified":"2026-10-12T15:10:00.207Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-304"],"updated_at":"2026-11-02T14:12:41.018848Z"}]}}