Home Fortinet CVE-2026-24858
CRITICAL: THIS VULNERABILITY IS ACTIVELY BEING EXPLOITED IN THE WILD (CISA KEV CATALOG)
Back to Fortinet

CVE-2026-24858

Exploited

FortiOS - Authentication Module

Fortinet CVSS 9.8 Updated March 16, 2026

Executive Risk Summary

"An Authentication Bypass Using an Alternate Path or Channel vulnerability in Fortinet products may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts. This vulnerability affects various Fortinet products, including FortiAnalyzer, FortiManager, FortiOS, FortiProxy, and FortiWeb."

Operational Audit Arsenal

Target Type Firmware Image
Target Asset FortiOS
Standard Path Global Firmware

Manual Verification Required

This is a non-Windows asset (Fortinet). Use the target asset details above to verify your version against vendor advisories.

Patch Impact Forecast

Reboot Required Likely

Moderate

Internal Work Notes

Fortinet Authentication Bypass Vulnerability: Verify FortiCloud SSO authentication is disabled or update to a patched version to prevent unauthorized access to devices.

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Scope of Impact

Fortinet FortianalyzerFortinet FortiosFortinet FortiwebFortinet FortiproxyFortinet Fortimanager

Original NVD 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."

Related Fortinet Threats

Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.