CVE-2026-24858
FortiOS vulnerability analysis and mitigation

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, 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 all versions, FortiProxy 7.0 all versions, 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.


SourceNVD

Related FortiOS vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-24858CRITICAL9.8
  • FortiOSFortiOS
  • cpe:2.3:a:fortinet:fortimanager
YesYesJan 27, 2026
CVE-2025-25249CRITICAL9.8
  • FortiOSFortiOS
  • cpe:2.3:o:fortinet:fortios
NoYesJan 13, 2026
CVE-2025-59718CRITICAL9.8
  • FortiOSFortiOS
  • cpe:2.3:a:fortinet:fortiproxy
YesYesDec 09, 2025
CVE-2025-62631MEDIUM5.6
  • FortiOSFortiOS
  • cpe:2.3:o:fortinet:fortios
NoYesDec 09, 2025
CVE-2024-40593MEDIUM4.4
  • FortiOSFortiOS
  • cpe:2.3:o:fortinet:fortios
NoYesDec 11, 2025

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