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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0059
Security Restriction Bypass Vulnerability in Fortinet Products

Original Issue Date:January 30, 2026

Severity Rating: CRITICAL

Software Affected

  • FortiAnalyzer versions from 7.6.0 through 7.6.5
  • FortiAnalyzer versions from 7.4.0 through 7.4.9
  • FortiAnalyzer versions from 7.2.0 through 7.2.11
  • FortiAnalyzer versions from 7.0.0 through 7.0.15
  • FortiManager versions from 7.6.0 through 7.6.5
  • FortiManager versions from 7.4.0 through 7.4.9
  • FortiManager versions from 7.2.0 through 7.2.11
  • FortiManager versions from 7.0.0 through 7.0.15
  • FortiOS versions from 7.6.0 through 7.6.5
  • FortiOS versions from 7.4.0 through 7.4.10
  • FortiOS versions from 7.2.0 through 7.2.12
  • FortiOS versions from 7.0.0 through 7.0.18
  • FortiProxy versions from 7.6.0 through 7.6.4
  • FortiProxy versions from 7.4.0 through 7.4.12
  • FortiProxy versions from 7.2.0 through 7.2.15
  • FortiProxy versions from 7.0.0 through 7.0.22

Overview

An authentication bypass using an alternate path or channel vulnerability has been reported in multiple Fortinet products, which could allow an attacker to trigger security restriction bypass on the targeted system.

Target Audience
All end-user organizations and individuals using Fortinet Products.

Risk Assessment
High risk of unauthorized access to sensitive information.

Impact Assessment
Potential impact on system confidentiality, integrity, and availability due to full administrative ac-cess to affected devices.

Description

Fortinet FortiAnalyzer is a centralized logging, analytics, and reporting platform that provides visibility across Fortinet security devices. FortiManager is a centralized management platform used to configure and manage Fortinet security infrastructure. FortiOS is the unified operating system that serves as the common security and networking foundation across Fortinet products.

This vulnerability exists due to an authentication bypass using an alternate path or channel in the FortiCloud SSO mechanism, which allows administrative authentication via an unintended authentication path when FortiCloud SSO is enabled.

Successful exploitation may allow an attacker with a FortiCloud account to log in with adminis-trative privileges, download device configuration files, and create new local administrator ac-counts to establish persistence on affected systems.

Note: This vulnerability (CVE-2026-24858) is being exploited in the wild. Users are strongly ad-vised to apply the latest patches immediately.

Solution

Apply appropriate updates as mentioned by the vendor:
https://www.fortiguard.com/psirt/FG-IR-26-060

References

Fortinet
https://www.fortiguard.com/psirt/FG-IR-26-060

CVE Name
CVE-2026-24858

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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