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critical9.8Known exploited

CVE-2026-24858

Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability

Exploited in the wild

This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2026-01-27. Federal due date: 2026-01-30.

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Impact

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.

Affected products

VendorProductAffected versions
FortinetFortianalyzer
from 7.0.0 through 7.0.15
from 7.2.0 through 7.2.11
from 7.4.0 before 7.4.10
from 7.6.0 before 7.6.6
FortinetFortimanager
from 7.0.0 through 7.0.15
from 7.2.0 through 7.2.11
from 7.4.0 before 7.4.10
from 7.6.0 before 7.6.6
FortinetFortinac-F
from 7.6.3 before 7.6.6
FortinetFortiproxy
from 7.0.0 through 7.0.22
from 7.2.0 through 7.2.15
from 7.4.0 through 7.4.12
from 7.6.0 through 7.6.4
FortinetFortiweb
from 7.4.0 through 7.4.11
from 7.6.0 through 7.6.6
from 8.0.0 through 8.0.3
FortinetFortios
from 7.0.0 through 7.0.18
from 7.2.0 through 7.2.12
from 7.4.0 before 7.4.11
from 7.6.0 before 7.6.6
SiemensRuggedcom Ape1808 Firmware
All versions

Weakness classification

CWE-288

References