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Vulnerabilities CVE-2026-24858

CVE-2026-24858

Medium
Open
KEV
TLP:CLEAR

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

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Description

Fortinet — Multiple Products — 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.

Details

EPSS Score
85.84%

99.7th percentile

Confidence
100%
CISA KEV
Date Added
Jan 27, 2026
Patch Due
Jan 30, 2026
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.
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