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Fortinet PSIRT AdvisoriesFG-IR-26-166

Unauthenticated Control of NAT Rules Leading to Exposure of Sensitive Information

CriticalVendor CVSS 9.9 / 10 1 CVE Published Sep 8, 2026 at 7:00 AM UTC
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Summary

CVSSv3 Score:

9.9

An improper access control vulnerability [CWE-284] in FortiSandbox, FortiSandbox Cloud and FortiSandbox PaaS WEB UI may allow an unauthenticated attacker to access sensitive information via crafted HTTP requests.

Revised on 2026-09-08 00:00:00

Products covered

  • FortiSandbox

  • FortiSandbox Cloud

Remediation

Separate remediation guidance was not included in the collected bulletin.

CVEs in this advisory 1

CVE-2026-26084
Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed the advisory summary.
    • Severity changed from High to Critical.
    • CVSS changed from 8.9 to 9.9.
    • Added CVEs: CVE-2026-26084.

Updates

  1. Published by Fortinet

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

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