Overview
Fortinet FortiOS and FortiProxy contain an authentication bypass vulnerability that may allow an unauthenticated, remote attacker to gain super-admin privileges via crafted requests to Node.js websocket module.
https://fortiguard.fortinet.com/psirt/FG-IR-24-535 ; https://nvd.nist.gov/vuln/detail/CVE-2024-55591
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2024-55591 |
| Vendor / Product | Fortinet — FortiOS and FortiProxy |
| NVD Published | 2025-01-14 |
| NVD Last Modified | 2025-10-24 |
| CVSS 3.1 Score | 9.8 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Severity | CRITICAL |
| CWE | CWE-288 |
| CISA KEV Added | 2025-01-14 |
| CISA KEV Deadline | 2025-01-21 |
| Known Ransomware Use | ⚠️ Yes |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2025-01-21.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Timeline
| Date | Event |
|---|---|
| 2025-01-14 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2025-01-21 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2024-55591 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |