Overview
The cybersecurity landscape is constantly changing with the emergence of new vulnerabilities and exploits, one of which is the CVE-2025-32756. Affecting multiple products under the Fortinet portfolio, this exploit poses a considerable threat due to its high severity score and the potential for system compromise and data leakage.
This vulnerability matters because it affects a wide range of widely-used Fortinet products and versions, potentially leaving countless systems exposed. It allows a remote unauthenticated attacker to execute arbitrary code or commands, thereby posing a significant risk to the confidentiality, integrity, and availability of the targeted systems.
Vulnerability Summary
CVE ID: CVE-2025-32756
Severity: Critical (CVSS Score 9.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System Compromise, Data Leakage
Affected Products
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Product | Affected Versions
FortiVoice | 7.2.0, 7.0.0-7.0.6, 6.4.0-6.4.10
FortiRecorder | 7.2.0-7.2.3, 7.0.0-7.0.5, 6.4.0-6.4.5
FortiMail | 7.6.0-7.6.2, 7.4.0-7.4.4, 7.2.0-7.2.7, 7.0.0-7.0.8
FortiNDR | 7.6.0, 7.4.0-7.4.7, 7.2.0-7.2.4, 7.0.0-7.0.6
FortiCamera | 2.1.0-2.1.3, 2.0 (all versions), 1.1 (all versions)
How the Exploit Works
The vulnerability is a stack-based buffer overflow exploit. It allows a remote attacker to send HTTP requests with a specially crafted hash cookie to affected Fortinet products. This causes the system to overflow its buffer, which in turn could enable the execution of arbitrary code or commands, leading to potential system compromise or data leakage.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. This is a hypothetical HTTP request that could be sent to a vulnerable endpoint:
POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Cookie: sessionid={specially_crafted_hash_cookie}
Content-Type: application/json
{ "malicious_payload": "..." }In this example, the “specially_crafted_hash_cookie” and “malicious_payload” represent the attacker’s exploit code, which could lead to the buffer overflow and subsequent arbitrary code execution. It is important to note that this is a conceptual example only and not actual exploit code.