{"id":"CVE-2026-102128","aliases":["EUVD-2026-90289"],"status":"published","title":"Kiteworks Email Protection Gateway Improper Authentication","description":"An identity-verification weakness in Kiteworks Email Protection Gateway allowed the gateway to act on the Kiteworks platform on behalf of a user it had not authenticated, and to provision a platform account for an identity it did not already know. A remote, unauthenticated sender could potentially exploit this to obtain control of a platform account.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0021,"percentile":0.11273,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2026-09-30T20:14:40Z","modified":"2026-10-08T13:44:09Z","products":[{"vendor":"accellion","product":"kiteworks"},{"vendor":"kiteworks","product":"email protection gateway"}],"references":[{"url":"https://github.com/kiteworks/security-advisories/security/advisories/GHSA-qjvp-25r3-rgx6","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json","tags":["third-party-advisory","Broken Link"]}],"sources":{"cve":[{"id":"CVE-2026-102128","title":"Kiteworks Email Protection Gateway Improper Authentication","description":"An identity-verification weakness in Kiteworks Email Protection Gateway allowed the gateway to act on the Kiteworks platform on behalf of a user it had not authenticated, and to provision a platform account for an identity it did not already know. A remote, unauthenticated sender could potentially exploit this to obtain control of a platform account.","status":"published","published":"2026-09-30T20:14:40.084Z","modified":"2026-10-01T13:37:05.46Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T13:39:05.585774Z"}],"euvd":[{"id":"EUVD-2026-90289","description":"An identity-verification weakness in Kiteworks Email Protection Gateway allowed the gateway to act on the Kiteworks platform on behalf of a user it had not authenticated, and to provision a platform account for an identity it did not already know. A remote, unauthenticated sender could potentially exploit this to obtain control of a platform account.","status":"published","published":"2026-09-30T20:14:40Z","modified":"2026-10-01T13:37:05Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T17:27:46.15359Z"}],"nvd":[{"id":"CVE-2026-102128","description":"An identity-verification weakness in Kiteworks Email Protection Gateway allowed the gateway to act on the Kiteworks platform on behalf of a user it had not authenticated, and to provision a platform account for an identity it did not already know. A remote, unauthenticated sender could potentially exploit this to obtain control of a platform account.","status":"published","published":"2026-09-30T21:17:01.27Z","modified":"2026-10-08T13:44:09.977Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:12:53.097633Z"}]}}