{"id":"CVE-2026-59565","aliases":["EUVD-2026-64881","GHSA-c34f-p2fw-3mjr"],"status":"published","title":"Local and kernel denial-of-service","description":"A remotely exploitable buffer overflow bug can cause a local and kernel denial-of-service attack on affected versions of Zscaler Client Connector on Windows.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00477,"percentile":0.41497,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-229"],"published":"2026-08-24T13:40:23Z","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-2026-59565"},{"url":"https://github.com/advisories/GHSA-c34f-p2fw-3mjr"}],"sources":{"cve":[{"id":"CVE-2026-59565","title":"Local and kernel denial-of-service","description":"A remotely exploitable buffer overflow bug can cause a local and kernel denial-of-service attack on affected versions of Zscaler Client Connector on Windows.","status":"published","published":"2026-08-24T13:40:23.684Z","modified":"2026-08-24T15:18:31.082Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-229"],"updated_at":"2026-11-02T14:19:58.944663Z"}],"euvd":[{"id":"EUVD-2026-64881","description":"A remotely exploitable buffer overflow bug can cause a local and kernel denial-of-service attack on affected versions of Zscaler Client Connector on Windows.","status":"published","published":"2026-08-24T13:40:23Z","modified":"2026-08-24T15:18:31Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:01:34.936274Z"}],"ghsa":[{"id":"GHSA-c34f-p2fw-3mjr","title":"A remotely exploitable buffer overflow bug can cause a local and kernel denial-of-service attack...","description":"A remotely exploitable buffer overflow bug can cause a local and kernel denial-of-service attack on affected versions of Zscaler Client Connector on Windows.","status":"published","published":"2026-08-24T15:31:51Z","modified":"2026-08-24T15:31:57Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-229"],"updated_at":"2026-11-02T15:10:53.487857Z"}],"nvd":[{"id":"CVE-2026-59565","description":"A remotely exploitable buffer overflow bug can cause a local and kernel denial-of-service attack on affected versions of Zscaler Client Connector on Windows.","status":"published","published":"2026-08-24T14:16:55.83Z","modified":"2026-10-12T15:10:00.207Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-229"],"updated_at":"2026-11-02T14:12:41.018848Z"}]}}