Fortinet FortiDLP up to 11.5.1 on Windows Outlookproxy path traversal

Summaryinfo

A vulnerability was found in Fortinet FortiDLP up to 11.5.1 on Windows and classified as critical. The impacted element is an unknown function of the component Outlookproxy. Such manipulation leads to path traversal. This vulnerability is listed as CVE-2025-53951. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Fortinet FortiDLP up to 11.5.1 on Windows. Affected by this issue is an unknown code of the component Outlookproxy. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability [CWE-22] in Fortinet FortiDLP Agent's Outlookproxy plugin for Windows 11.5.1 and 11.4.2 through 11.4.6 and 11.3.2 through 11.3.4 and 11.2.0 through 11.2.3 and 11.1.1 through 11.1.2 and 11.0.1 and 10.5.1 and 10.4.0, and 10.3.1 may allow an authenticated attacker to escalate their privilege to LocalService via sending a crafted request to a local listening port.

The advisory is shared for download at fortiguard.fortinet.com. This vulnerability is handled as CVE-2025-53951 since 07/15/2025. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• Fortinet

Name

• FortiDLP

Version

• 10.0
• 10.1
• 10.2
• 10.3
• 10.3.0
• 10.3.1
• 10.4.0
• 10.5.0
• 10.5.1
• 11.0
• 11.0.0
• 11.0.1
• 11.1
• 11.1.0
• 11.1.1
• 11.1.2
• 11.2.0
• 11.2.1
• 11.2.2
• 11.2.3
• 11.3.0
• 11.3.1
• 11.3.2
• 11.3.3
• 11.3.4
• 11.4.0
• 11.4.1
• 11.4.2
• 11.4.3
• 11.4.4
• 11.4.5
• 11.4.6
• 11.5.0
• 11.5.1

License

• commercial

Website

• Vendor: https://www.fortinet.com/

CPE 2.3info

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CPE 2.2info

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