{"id":"CVE-2026-24858","aliases":["EUVD-2026-4712","GHSA-2x38-48vp-w23x"],"status":"published","title":"An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability...","description":"An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiNAC-F 7.6.3 through 7.6.5, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.","severity":{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.86592,"percentile":0.99744,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-288"],"published":"2026-01-27T19:18:23Z","modified":"2026-06-17T10:23:43Z","kev":{"date_added":"2026-01-27","due_date":"2026-01-30","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-01-27"},{"source":"kev","since":"2026-01-27"}],"exploits":[{"source":"pocgithub","id":"m0d0ri205/CVE-2026-24858","title":"m0d0ri205/CVE-2026-24858","date":"2026-01-28","url":"https://github.com/m0d0ri205/CVE-2026-24858"},{"source":"pocgithub","id":"SimoesCTT/-CTT-NSP-Convergent-Time-Theory---Network-Stack-Projection-CVE-2026-24858-","title":"SimoesCTT/-CTT-NSP-Convergent-Time-Theory---Network-Stack-Projection-CVE-2026-24858-","date":"2026-01-30","url":"https://github.com/SimoesCTT/-CTT-NSP-Convergent-Time-Theory---Network-Stack-Projection-CVE-2026-24858-"},{"source":"pocgithub","id":"absholi7ly/CVE-2026-24858-FortiCloud-SSO-Authentication-Bypass","title":"absholi7ly/CVE-2026-24858-FortiCloud-SSO-Authentication-Bypass","date":"2026-01-30","url":"https://github.com/absholi7ly/CVE-2026-24858-FortiCloud-SSO-Authentication-Bypass"},{"source":"pocgithub","id":"SimoesCTT/SCTT-2026-33-0004-FortiCloud-SSO-Identity-Singularity","title":"SimoesCTT/SCTT-2026-33-0004-FortiCloud-SSO-Identity-Singularity","date":"2026-01-31","url":"https://github.com/SimoesCTT/SCTT-2026-33-0004-FortiCloud-SSO-Identity-Singularity"},{"source":"pocgithub","id":"gagaltotal/cve-2026-24858","title":"gagaltotal/cve-2026-24858","date":"2026-02-10","url":"https://github.com/gagaltotal/cve-2026-24858"}],"products":[{"vendor":"fortinet","product":"fortianalyzer"},{"vendor":"fortinet","product":"fortimanager"},{"vendor":"fortinet","product":"fortinac-f"},{"vendor":"fortinet","product":"fortios"},{"vendor":"fortinet","product":"fortiproxy"},{"vendor":"fortinet","product":"fortiweb"},{"vendor":"fortinet","product":"multiple products"},{"vendor":"siemens","product":"ruggedcom ape1808"},{"vendor":"siemens","product":"ruggedcom_ape1808_firmware"}],"references":[{"url":"https://fortiguard.fortinet.com/psirt/FG-IR-26-060","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24858","tags":["government-resource","US Government Resource"]},{"url":"https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios","tags":["vendor-advisory","Mitigation","Vendor Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-975644.html","tags":["Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24858"},{"url":"https://github.com/advisories/GHSA-2x38-48vp-w23x"}],"sources":{"cve":[{"id":"CVE-2026-24858","description":"An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiNAC-F 7.6.3 through 7.6.5, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.","status":"published","published":"2026-01-27T19:18:23.591Z","modified":"2026-06-09T14:27:53.379Z","cvss":[{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T14:19:50.575061Z"}],"euvd":[{"id":"EUVD-2026-4712","description":"An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiNAC-F 7.6.3 through 7.6.5, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.","status":"published","published":"2026-01-27T19:18:23Z","modified":"2026-06-09T14:27:53Z","cvss":[{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C","level":"critical"}],"exploited_since":"2026-01-27","updated_at":"2026-11-02T18:20:48.012898Z"}],"ghsa":[{"id":"GHSA-2x38-48vp-w23x","title":"An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability...","description":"An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.","status":"published","published":"2026-01-27T21:31:49Z","modified":"2026-05-12T15:32:21Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T15:08:04.998143Z"}],"kev":[{"id":"CVE-2026-24858","title":"Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability","description":"Fortinet FortiAnalyzer, FortiManager, FortiOS, and FortiProxy contain an authentication bypass using an alternate path or channel that could allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.","cwes":["CWE-288"],"kev":{"date_added":"2026-01-27","due_date":"2026-01-30","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-24858","description":"An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiNAC-F 7.6.3 through 7.6.5, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.","status":"published","published":"2026-01-27T20:16:24.477Z","modified":"2026-06-17T10:23:43.04Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-288"],"updated_at":"2026-11-02T14:12:04.769088Z"}]}}