Missing Authentication in FortiOS Allows Unauthorized Code Execution

Publication date: 2026-04-14

Last updated on: 2026-04-20

Assigner: Fortinet, Inc.

Description

A missing authentication for critical function vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiOS 6.4 all versions, FortiOS 6.2.9 through 6.2.17 allows attacker to execute unauthorized code or commands via specially crafted packets.

CVSS Scores

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Meta Information

Published

2026-04-14

Last Modified

2026-04-20

Generated

2026-07-06

AI Q&A

2026-04-14

EPSS Evaluated

2026-07-05

NVD

CVE-2025-53847

EUVD

EUVD-2025-209450

Affected Vendors & Products

Vendor	Product	Version / Range
fortinet	fortios	From 7.6.0 (inc) to 7.6.4 (exc)
fortinet	fortios	From 7.2.0 (inc) to 7.2.12 (exc)
fortinet	fortios	From 7.4.0 (inc) to 7.4.9 (exc)
fortinet	fortios	From 6.2.9 (inc) to 7.0.18 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-306	The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

Attack-Flow Graph

Executive Summary

This vulnerability is a missing authentication for a critical function in multiple versions of Fortinet FortiOS. It allows an attacker to execute unauthorized code or commands by sending specially crafted packets to the affected system.

Impact Analysis

The impact of this vulnerability is that an attacker can execute unauthorized commands or code on the affected FortiOS devices without proper authentication. This could lead to unauthorized control or manipulation of the device, potentially compromising the security and integrity of the network.

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