Is It On KEV?

Fortinet Multiple Products

YES - ON THE CISA KEV LIST
CVE-2026-24858

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

CISA catalog due date2026-01-30
285 days past due
EPSS exploit probability (next 30 days)86.6% · 100percentile
From CVE publication to KEV listing0 days (2026-01-27 → 2026-01-27)
Remediation window (KEV listing to due date)3 days
Days on the KEV list288 days
Date added to KEV2026-01-27
Known ransomware campaign useUnknown
VendorFortinet
ProductMultiple Products
Weaknesses (CWE)CWE-288

Fortinet: 32 entries (1.8% of all KEV entries are from this vendor); 9 added in 2026.

BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.

Your BOD 26-04 window (SSVC tier helper)

Your remediation window ends:

Description

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.

Required action (CISA)

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

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

References

Other KEV entries for this vendor: Fortinet

Fortinet - Vendors with KEV entries

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