FortiOS
CVE-2024-55591: FortiOS and FortiProxy Authentication Bypass
An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS version 7.0.0 through 7.0.16 and FortiProxy version 7.0.0 through 7.0.19 and 7.2.0 through 7.2.12 allows a remote attacker to gain super-admin privileges via crafted requests to Node.js websocket module.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| FortiOS 7.0.0 to 7.0.16 | 7.0.17 or later |
| FortiProxy 7.2.0 to 7.2.12 | 7.2.13 or later |
| FortiProxy 7.0.0 to 7.0.19 | 7.0.20 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS version 7.0.0 through 7.0.16 and FortiProxy version 7.0.0 through 7.0.19 and 7.2.0 through 7.2.12 allows a remote attacker to gain super-admin privileges via crafted requests to Node.js websocket module.
Exploitation
CISA lists this CVE as exploited in the wild since 14 Jan 2025, including in ransomware campaigns.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.