CVE-2025-62439
Undergoing Analysis Undergoing Analysis - In Progress

Improper Verification Vulnerability in Fortinet FortiOS Enables Unauthorized Access

Vulnerability report for CVE-2025-62439, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-02-10

Last updated on: 2026-02-10

Assigner: Fortinet, Inc.

Description

An Improper Verification of Source of a Communication Channel vulnerability [CWE-940] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions may allow an authenticated user with knowledge of FSSO policy configurations to gain unauthorized access to protected network resources via crafted requests.

CVSS Scores

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Meta Information

Published
2026-02-10
Last Modified
2026-02-10
Generated
2026-07-06
AI Q&A
2026-02-10
EPSS Evaluated
2026-07-05
NVD
EUVD

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
fortinet fortios 7.6
fortinet fortios 7.4
fortinet fortios 7.2
fortinet fortios 7.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-940 The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin.

Attack-Flow Graph

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Executive Summary

This vulnerability is an Improper Verification of Source of a Communication Channel (CWE-940) found in Fortinet FortiOS versions 7.6.0 through 7.6.4, 7.4.0 through 7.4.9, 7.2 all versions, and 7.0 all versions.

It allows an authenticated user who knows the Fortinet Single Sign-On (FSSO) policy configurations to gain unauthorized access to protected network resources by sending specially crafted requests.

Impact Analysis

The vulnerability can allow an authenticated user with limited privileges and knowledge of FSSO policy configurations to escalate their access and reach protected network resources without proper authorization.

This unauthorized access can lead to potential exposure or compromise of sensitive data and network assets.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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