CVE-2026-24858
Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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.
CISA notes
Please adhere to Fortinet's guidelines to assess exposure and mitigate risks. Check for signs of potential compromise on all internet accessible Fortinet products affected by this vulnerability. Apply any final mitigations provided by the vendor as soon as they become available. For more information please see: https://fortiguard.fortinet.com/psirt/FG-IR-26-060 ; https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios ; https://nvd.nist.gov/vuln/detail/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.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:CAffected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Fortinet | FortiWeb | 8.0.0 to 8.0.3 7.6.0 to 7.6.6 7.4.0 to 7.4.11 |
| Fortinet | FortiNAC-F | 7.6.3 to 7.6.5 |
| Fortinet | FortiOS | 7.6.0 to 7.6.5 7.4.0 to 7.4.10 7.2.0 to 7.2.12 7.0.0 to 7.0.18 |
| Fortinet | FortiAnalyzer | 7.6.0 to 7.6.5 7.4.0 to 7.4.9 7.2.0 to 7.2.11 7.0.0 to 7.0.15 |
| Fortinet | FortiProxy | 7.6.0 to 7.6.4 7.4.0 to 7.4.12 7.2.0 to 7.2.15 7.0.0 to 7.0.22 |
| Fortinet | FortiManager | 7.6.0 to 7.6.5 7.4.0 to 7.4.9 7.2.0 to 7.2.11 7.0.0 to 7.0.15 |
References
1 LinksRecord Details
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