ACTIVELY EXPLOITED
CVE-2024-55591: Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability
| Vendor | Fortinet |
|---|---|
| Product | FortiOS and FortiProxy |
| Actively exploited | Yes |
| Added to CISA KEV | 14 Jan 2025 |
| CISA federal deadline | 21 Jan 2025 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-288 |
Required action (CISA's text)
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Description (NVD)
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.
SOURCES
Other Fortinet flaws
- CVE-2025-61624: Fortinet Multiple Products Path Traversal Vulnerability
- CVE-2026-104286: Fortinet FortiMail Path Traversal Vulnerability
- CVE-2025-25249: Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
- CVE-2025-68686: Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability
- CVE-2026-39808: Fortinet FortiSandbox OS Command Injection Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.