Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 27/01/2026. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| fortianalyzer | ≥ 7.0.0, ≤ 7.0.15≥ 7.2.0, ≤ 7.2.11≥ 7.4.0, < 7.4.10≥ 7.6.0, < 7.6.6 | 7.4.107.6.6 |
| fortimanager | ≥ 7.0.0, ≤ 7.0.15≥ 7.2.0, ≤ 7.2.11≥ 7.4.0, < 7.4.10≥ 7.6.0, < 7.6.6 | 7.4.107.6.6 |
| fortinac-f | ≥ 7.6.3, < 7.6.6 | 7.6.6 |
| fortiproxy | ≥ 7.0.0, ≤ 7.0.22≥ 7.2.0, ≤ 7.2.15≥ 7.4.0, ≤ 7.4.12≥ 7.6.0, ≤ 7.6.4 | |
| fortiweb | ≥ 7.4.0, ≤ 7.4.11≥ 7.6.0, ≤ 7.6.6≥ 8.0.0, ≤ 8.0.3 |
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.
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