Home / Items
VulnerabilityKnown exploitedExploit likelihood 87%
Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
CVE-2026-24858 · CISA KEV · January 27, 2026
Summary
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.
From CISA, quoted as published. Check the source before acting.
What to do
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 required action, quoted.
Affected products
| Vendor | Product |
|---|---|
| Fortinet | Multiple Products |
Why it's on these mode pages
- Maritime: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
- Pipeline: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
- Freight rail: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
- Passenger rail and transit: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
- Highway and motor carrier: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
- Postal and parcel: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
Change history
- November 9, 2026: First collected by Watch
Securidigm Scout can match advisories like this one to the equipment on your own network, offline. securidigm.com