Fortinet: Out of bounds read in GUI

Description

An out of bounds read [CWE-125] vulnerability in FortiAuthenticator may allow a remote unauthenticated attacker to retrieve sensitive information via a specially crafted request. Revised on 2026-07-14 00:00:00

What to do

Install the fixed versions listed in the official advisory. If you cannot update right away, apply the workarounds or mitigations it describes and limit access to the affected service.

Details

Vendor

Fortinet

Product

FortiAuthenticator

Affected versions

FortiAuthenticator 6.6: from 6.6.0 to 6.6.2 — fixed in 6.6.3
FortiAuthenticator 6.5: all versions 6.5 (from the advisory and NVD; check the exact builds in the official advisory)

CVSS score

7.5

Actively exploited

Not known at this time

Source

Fortinet PSIRT – original advisory

Published

July 14, 2026

The description and the recommended action are quoted from the public advisory (the action is our generic advice); severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.