CVE-2026-24858
CRITICALCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Tags
Description
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.
Analysis
Fortinet FortiAnalyzer and FortiManager contain a critical authentication bypass vulnerability (CVE-2026-24858, CVSS 9.8) that allows unauthenticated remote attackers to gain administrative access through an alternate authentication path. With EPSS 2.8% but KEV listing confirming active exploitation, this vulnerability threatens the security management infrastructure that organizations rely on to protect their networks.
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 24 hours: Identify all FortiAnalyzer instances running versions up to 7.6.5 and assess their criticality; disable FortiCloud integration if operationally feasible. Within 7 days: Implement network segmentation to restrict FortiAnalyzer access; enable enhanced logging and monitoring for authentication anomalies; consider air-gapping critical instances. …
Sign in for detailed remediation steps.
Priority Score
Share
External POC / Exploit Code
Leaving vuln.today