{"id":"CVE-2021-26088","aliases":["EUVD-2021-12909","GHSA-pp6p-mhjc-6vgp"],"status":"published","title":"An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an...","description":"An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an unauthenticated user to bypass a FSSO firewall policy and access the protected network via sending specifically crafted UDP login notification packets.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01031,"percentile":0.64018,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-287"],"published":"2021-07-12T13:21:41Z","modified":"2026-06-17T03:42:50Z","exploits":[{"source":"pocgithub","id":"theogobinet/CVE-2021-26088","title":"theogobinet/CVE-2021-26088","date":"2023-05-09","url":"https://github.com/theogobinet/CVE-2021-26088"}],"products":[{"vendor":"fortinet","product":"fortinet fsso windows dc agent, fsso windows ca"},{"vendor":"fortinet","product":"fortinet_single_sign-on"}],"references":[{"url":"https://fortiguard.com/advisory/FG-IR-20-191","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26088"},{"url":"https://github.com/advisories/GHSA-pp6p-mhjc-6vgp"}],"sources":{"cve":[{"id":"CVE-2021-26088","description":"An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an unauthenticated user to bypass a FSSO firewall policy and access the protected network via sending specifically crafted UDP login notification packets.","status":"published","published":"2021-07-12T13:21:41Z","modified":"2024-10-25T13:55:38.588Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:32:57.368269Z"}],"euvd":[{"id":"EUVD-2021-12909","description":"An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an unauthenticated user to bypass a FSSO firewall policy and access the protected network via sending specifically crafted UDP login notification packets.","status":"published","published":"2021-07-12T13:21:41Z","modified":"2024-10-25T13:55:38Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L","level":"high"}],"updated_at":"2026-11-03T00:05:19.027476Z"}],"ghsa":[{"id":"GHSA-pp6p-mhjc-6vgp","title":"An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an...","description":"An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an unauthenticated user to bypass a FSSO firewall policy and access the protected network via sending specifically crafted UDP login notification packets.","status":"published","published":"2022-05-24T19:07:31Z","modified":"2023-01-30T05:00:40Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:46:15.397604Z"}],"nvd":[{"id":"CVE-2021-26088","description":"An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an unauthenticated user to bypass a FSSO firewall policy and access the protected network via sending specifically crafted UDP login notification packets.","status":"published","published":"2021-07-12T14:15:08.113Z","modified":"2026-06-17T03:42:50.427Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":5.8,"vector":"AV:A/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:06:55.747384Z"}]}}