# CVE-2025-46373: A Heap-based Buffer Overflow vulnerability [CWE-122] vulnerability in Fortinet FortiClientWindows 7.4.0 through 7.4.3, FortiClientWindows 7.

Source: https://junglewise.ai/threats/cve-2025-46373-a-heap-based-buffer-overflow-vulnerability-cwe-122-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-18  
License: CC BY 4.0 with a link back

CVE-2025-46373 · Severity: high · CVSS 7.8 · Published 2025-11-18

A Heap-based Buffer Overflow vulnerability [CWE-122] vulnerability in Fortinet FortiClientWindows 7.4.0 through 7.4.3, FortiClientWindows 7.2.0 through 7.2.8 may allow an authenticated local IPSec user to execute arbitrary code or commands via "fortips_74.sys". The attacker would need to bypass the  Windows heap integrity protections

Technologies: [Fortinet Forticlient](https://junglewise.ai/threats/technologies/forticlient). Vendors: [Fortinet](https://junglewise.ai/threats/vendors/fortinet).

## Quick answers

**Is CVE-2025-46373 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-46373 being exploited in the wild.

**How severe is CVE-2025-46373?** High severity, with a CVSS score of 7.8, published 18 November 2025.

**Which products and versions are affected?** Fortinet Forticlient. The advisory does not name versions.

**Is there a fix for CVE-2025-46373?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-46373?** Check whether you run Fortinet Forticlient. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Fortinet Forticlient

## Related threats

- [A buffer copy without checking size of input ('classic buffer overflow') vulnerability in Fortinet FortiClientWindows…](https://junglewise.ai/threats/cve-2026-70465-a-buffer-copy-without-checking-size-of-input-classic-buffer)
- [Fortinet FortiClientWindows hard-coded cryptographic key in GUI](https://junglewise.ai/threats/cve-2026-44278-fortinet-forticlientwindows-hard-coded-cryptographic-key-in-gui)
- [An active debug code vulnerability in Fortinet FortiClientWindows 7.4.0 through 7.4.3, FortiClientWindows 7.2.0…](https://junglewise.ai/threats/cve-2025-54660-an-active-debug-code-vulnerability-in-fortinet-forticlientwindows)
- [An Exposed IOCTL with Insufficient Access Control vulnerability [CWE-782] vulnerability in Fortinet FortiClientWindows…](https://junglewise.ai/threats/cve-2025-47761-an-exposed-ioctl-with-insufficient-access-control-vulnerability)