🔐 CVE Alert

CVE-2026-24858

CRITICAL 9.4 ⚠️ CISA KEV
CVSS Score
9.4
EPSS Score
2.4%
EPSS Percentile
85th

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 7.2.0 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.

CWE CWE-288
Vendor fortinet
Product fortios
Ecosystems
Industries
NetworkingSecurity
Published Jan 27, 2026
Last Updated Mar 23, 2026
⚠️ Actively Exploited — Act Now

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Affected Versions

Fortinet / FortiOS
7.6.0 ≤ 7.6.5 7.4.0 ≤ 7.4.10 7.2.0 ≤ 7.2.12 7.0.0 ≤ 7.0.18
Fortinet / FortiManager
7.6.0 ≤ 7.6.5 7.4.0 ≤ 7.4.9 7.2.0 ≤ 7.2.11 7.0.0 ≤ 7.0.15
Fortinet / FortiAnalyzer
7.6.0 ≤ 7.6.5 7.4.0 ≤ 7.4.9 7.2.0 ≤ 7.2.11 7.0.0 ≤ 7.0.15
Fortinet / FortiProxy
7.6.0 ≤ 7.6.4 7.4.0 ≤ 7.4.12 7.2.0 ≤ 7.2.15 7.0.0 ≤ 7.0.22
Fortinet / FortiWeb
8.0.0 ≤ 8.0.3 7.6.0 ≤ 7.6.6 7.4.0 ≤ 7.4.11

References

NVD ↗ CVE.org ↗ EPSS Data ↗
fortiguard.fortinet.com: https://fortiguard.fortinet.com/psirt/FG-IR-26-060 cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24858 fortinet.com: https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios