What is the CVSS score of CVE-2025-46373?

CVE-2025-46373 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Windows are affected by CVE-2025-46373?

Organizations using Fortinet FortiClientWindows 7.4.0 face notable risk from CVE-2025-46373, a heap-based buffer overflow vulnerability rated CVSS 7.8.

How to fix or mitigate CVE-2025-46373?

Within 30 days: Identify all affected systems running Fortinet FortiClientWindows 7.4.0 and apply vendor patches as part of regular patch cycle. If patching is delayed, consider network segmentation to limit exposure.

Windows CVE-2025-46373

HIGH

Heap-based Buffer Overflow (CWE-122)

2025-11-18 psirt@fortinet.com

Windows RCE Buffer Overflow Fortinet Heap Overflow Microsoft Forticlient

7.8

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:22 vuln.today

CVE Published

Nov 18, 2025 - 17:16 nvd

HIGH 7.8

DescriptionNVD

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

AnalysisAI

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. Rated high severity (CVSS 7.8). No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-122. 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 Affected products include: Fortinet Forticlient. Version information: through 7.4.3.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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CVE-2025-46373 vulnerability details – vuln.today

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Windows CVE-2025-46373

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code