SB2025111867 - Heap-based buffer overflow in Fortinet FortiClient for Windows
Published: November 18, 2025
Security Bulletin ID
SB2025111867
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2025-46373)
The vulnerability allows a local authenticated user to execute arbitrary code.
The vulnerability exists due to heap-based buffer overflow via fortips driver. An authenticated local ipsec user can execute arbitrary code or commands via "fortips_74.sys" driver. The attacker would need to bypass the Windows heap integrity protections.
Remediation
Install update from vendor's website.