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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0251
Improper Access Control Vulnerability in FortiAuthenticator

Original Issue Date:May 20, 2026

Severity Rating: CRITICAL

Software Affected

  • Forti Authenticator 8.0.0 through 8.0.2
  • Forti Authenticator 6.6.0 through 6.6.8
  • Forti Authenticator 6.5.0 through 6.5.6

Overview

A vulnerability has been reported in FortiAuthenticator which could allow an unauthenticated attacker to execute unauthorized code or commands via specially crafted requests on the affected system.

Target Audience:
All organizations and administrators using affected versions of FortiAuthenticator.

Risk Assessment:
High risk of unauthorized code or command execution and potential system compromise.

Impact Assessment:
Potential for unauthorized commands execution, system compromise.

Description

FortiAuthenticator is used for centralized authentication, identity management, and secure access services within enterprise environments.

An Improper Access Control vulnerability exists in FortiAuthenticator API endpoints. An unauthenticated remote attacker could exploit this vulnerability by sending specially crafted requests.

Successful exploitation of this vulnerability could allow a remote attacker to execute unauthorized code or commands on the targeted system.

Solution

Apply appropriate fix/patches as mentioned in the vendor advisory:
https://fortiguard.fortinet.com/psirt/FG-IR-26-128

Vendor Information

Fortinet
https://fortiguard.fortinet.com/psirt/FG-IR-26-128

References

Fortinet
https://fortiguard.fortinet.com/psirt/FG-IR-26-128

CVE Name
CVE-2026-44277

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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