CVE-2025-53951: Escalation of privilege in Fortinet FortiDLP
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.
AI Analysis
Technical Summary
This vulnerability (CVE-2025-53951) involves improper limitation of a pathname to a restricted directory (path traversal) in the Fortinet FortiDLP Agent's Outlookproxy plugin on Windows. It affects versions 10.3.1, 10.4.0, 10.5.1, 11.0.1, 11.1.1 through 11.1.2, 11.2.0 through 11.2.3, 11.3.2 through 11.3.4, 11.4.2 through 11.4.6, and 11.5.1. An authenticated attacker can exploit this vulnerability by sending a crafted request to a local listening port, resulting in privilege escalation to the LocalService account. The CVSS v3.1 base score is 4.9 (medium severity), reflecting local attack vector, low complexity, low privileges required, no user interaction, and partial impact to confidentiality, integrity, and availability. The vendor has released an official fix for this vulnerability.
Potential Impact
An authenticated attacker with local access can exploit this vulnerability to escalate privileges to the LocalService account on affected FortiDLP Agent installations. This could allow the attacker to perform actions with higher privileges than initially granted, potentially leading to further compromise of the system. The impact is rated medium based on the CVSS score of 4.9, indicating limited but meaningful confidentiality, integrity, and availability impacts.
Mitigation Recommendations
An official fix is available from Fortinet to remediate this vulnerability. Users of affected FortiDLP versions should apply the vendor-provided patches promptly to mitigate the risk of privilege escalation. Since this is not a cloud service, remediation requires updating the affected software versions on-premises.
CVE-2025-53951: Escalation of privilege in Fortinet FortiDLP
Description
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.
CVSS v3.1
Score 4.9medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2025-53951) involves improper limitation of a pathname to a restricted directory (path traversal) in the Fortinet FortiDLP Agent's Outlookproxy plugin on Windows. It affects versions 10.3.1, 10.4.0, 10.5.1, 11.0.1, 11.1.1 through 11.1.2, 11.2.0 through 11.2.3, 11.3.2 through 11.3.4, 11.4.2 through 11.4.6, and 11.5.1. An authenticated attacker can exploit this vulnerability by sending a crafted request to a local listening port, resulting in privilege escalation to the LocalService account. The CVSS v3.1 base score is 4.9 (medium severity), reflecting local attack vector, low complexity, low privileges required, no user interaction, and partial impact to confidentiality, integrity, and availability. The vendor has released an official fix for this vulnerability.
Potential Impact
An authenticated attacker with local access can exploit this vulnerability to escalate privileges to the LocalService account on affected FortiDLP Agent installations. This could allow the attacker to perform actions with higher privileges than initially granted, potentially leading to further compromise of the system. The impact is rated medium based on the CVSS score of 4.9, indicating limited but meaningful confidentiality, integrity, and availability impacts.
Mitigation Recommendations
An official fix is available from Fortinet to remediate this vulnerability. Users of affected FortiDLP versions should apply the vendor-provided patches promptly to mitigate the risk of privilege escalation. Since this is not a cloud service, remediation requires updating the affected software versions on-premises.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- fortinet
- Date Reserved
- 2025-07-15T09:52:08.702Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
Threat ID: 68f0fda89f8a5dbaead89172
Added to database: 10/16/2025, 14:14:00 UTC
Last enriched: 07/09/2026, 08:44:59 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 323
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