Overview
CVE-2025-58413 is a high-severity stack-based buffer overflow vulnerability affecting multiple versions of Fortinet FortiOS and FortiSASE. This vulnerability allows a remote attacker to execute unauthorized code or commands on the affected device by sending specially crafted packets. This can lead to complete system compromise.
Technical Details
The vulnerability resides in how FortiOS handles certain network packets. A specially crafted packet can overwrite the stack buffer, leading to arbitrary code execution. The impacted versions are:
- FortiOS 7.6.0 through 7.6.3
- FortiOS 7.4.0 through 7.4.8
- FortiOS 7.2 (all versions)
- FortiOS 7.0 (all versions)
- FortiOS 6.4 (all versions)
- FortiOS 6.2 (all versions)
- FortiOS 6.0 (all versions)
- FortiSASE 25.3.b
The specific packet structure and vulnerable function are detailed in the Fortinet advisory (see references below).
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) score for CVE-2025-58413 is 7.5 (HIGH). This score indicates a significant risk due to the potential for remote code execution. The breakdown of the score includes:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Changed
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
Possible Impact
Successful exploitation of CVE-2025-58413 can have severe consequences, including:
- Remote Code Execution: An attacker can execute arbitrary code on the affected device.
- System Compromise: Complete control of the FortiOS or FortiSASE device.
- Data Breach: Unauthorized access to sensitive data traversing the network.
- Denial of Service: Disrupting network services and causing downtime.
- Lateral Movement: Using the compromised device as a pivot point to attack other systems on the network.
Mitigation and Patch Steps
It is critical to apply the appropriate patches as soon as possible. Fortinet has released updates to address this vulnerability. Follow these steps:
- Identify Affected Devices: Determine which of your Fortinet FortiOS and FortiSASE devices are running the vulnerable versions.
- Apply Patches: Upgrade to the latest stable version of FortiOS or FortiSASE as recommended by Fortinet. Refer to the Fortinet advisory for specific version recommendations.
- Monitor Network Traffic: Implement network intrusion detection systems (NIDS) to monitor for suspicious traffic patterns that may indicate exploitation attempts.
- Implement Network Segmentation: Limit the blast radius of a potential compromise by segmenting your network.
- Review Access Controls: Ensure that access controls are properly configured to restrict unauthorized access to FortiOS devices.
Regularly check the Fortinet support website for the latest security advisories and updates.
