Fortinet FortiOS up to 7.0.19/7.2.13/7.4.9/7.6.4 verification of source

Summaryinfo

A vulnerability was found in Fortinet FortiOS up to 7.0.19/7.2.13/7.4.9/7.6.4. It has been classified as problematic. Affected by this issue is some unknown functionality. The manipulation leads to verification of source. This vulnerability is listed as CVE-2025-62439. The attack must be carried out locally. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Fortinet FortiOS up to 7.0.19/7.2.13/7.4.9/7.6.4. It has been rated as problematic. This issue affects an unknown code block. The manipulation with an unknown input leads to a verification of source vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at fortiguard.fortinet.com. The identification of this vulnerability is CVE-2025-62439 since 10/14/2025. The exploitation is known to be difficult. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 7.4.10 or 7.6.5 eliminates this vulnerability.

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Productinfo

Type

• Firewall Software

Vendor

• Fortinet

Name

• FortiOS

Version

• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.0.9
• 7.0.10
• 7.0.11
• 7.0.12
• 7.0.13
• 7.0.14
• 7.0.15
• 7.0.16
• 7.0.17
• 7.0.18
• 7.0.19
• 7.2.0
• 7.2.1
• 7.2.2
• 7.2.3
• 7.2.4
• 7.2.5
• 7.2.6
• 7.2.7
• 7.2.8
• 7.2.9
• 7.2.10
• 7.2.11
• 7.2.12
• 7.2.13
• 7.4.0
• 7.4.1
• 7.4.2
• 7.4.3
• 7.4.4
• 7.4.5
• 7.4.6
• 7.4.7
• 7.4.8
• 7.4.9
• 7.6.0
• 7.6.1
• 7.6.2
• 7.6.3
• 7.6.4

License

• commercial

Website

• Vendor: https://www.fortinet.com/

CPE 2.3info

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CPE 2.2info

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