CVE-2026-24858

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

Severity

Critical 9.4

CVSS 3.1

Remote · no auth what this means

Exploited

Yes — in CISA KEV

Added Jan 27, 2026

EPSS

0.858

99.7th percentile

Discovered by

Third party

Vendor advisory field

Published

Jan 27, 2026

Assigned by fortinet

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.

Weakness: CWE-288

Affected products

Vendor	Product	Category	Matched by
Fortinet	FortiAnalyzer Check your version	SIEM & Log Management	cna-assigner
Fortinet	FortiManager Check your version	Network & Security Management	cna-assigner
Fortinet	FortiNAC	Identity / IAM / MFA	cna-assigner
Fortinet	FortiOS Check your version	Firewall / NGFW	cna-assigner
Fortinet	FortiProxy Check your version	SASE / SSE / Secure Web	cna-assigner
Fortinet	FortiWeb Check your version	Web & Application Security	cna-assigner

Vendor-reported products (7)

Fortinet · FortiWeb
Fortinet · FortiNAC-F
Fortinet · FortiOS
Fortinet · FortiAnalyzer
Fortinet · FortiProxy
Fortinet · FortiManager
Siemens · RUGGEDCOM APE1808

Credit

External

Vendor remediation

Upgrade to upcoming FortiOS version 8.0.0 or above Upgrade to FortiOS version 7.6.6 or above Upgrade to FortiOS version 7.4.11 or above Upgrade to FortiOS version 7.2.13 or above Upgrade to FortiOS version 7.0.19 or above Upgrade to upcoming FortiManager version 8.0.0 or above Upgrade to FortiManager version 7.6.6 or above Upgrade to FortiManager version 7.4.10 or above Upgrade to FortiManager version 7.2.12 or above Upgrade to FortiManager version 7.0.16 or above Upgrade to FortiAnalyzer version 7.6.6 or above Upgrade to FortiAnalyzer version 7.4.10 or above Upgrade to FortiAnalyzer version 7.2.12 or above Upgrade to FortiAnalyzer version 7.0.16 or above Upgrade to FortiProxy version 7.6.5 or above Upgrade to FortiProxy version 7.4.13 or above Upgrade to FortiProxy version 7.2.16 or above Upgrade to FortiProxy version 7.0.23 or above Upgrade to FortiWeb version 8.0.4 or above Upgrade to FortiWeb version 7.6.7 or above Upgrade to FortiWeb version 7.4.12 or above Upgrade to FortiNAC-F version 7.6.6 or above Upgrade to FortiSwitchManager version 7.2.9 or above Upgrade to FortiSwitchManager version 7.0.8 or above

References

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