Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability
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.
What happened
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.
CISA lists it as exploited, added 14 Jan 2025.
Does it affect you
Names Fortinet FortiGate (FortiOS). Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Follow the vendor advisory for the fixed release and any interim mitigation.
fortiguard.fortinet.com - Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
cisa.gov
CISA’s notes for this entry:
Affected, as published to NVD
- forti-os
- Fortinet FortiGate (FortiOS): 7.0.0 up to the fix in 7.0.20
The record
- NVD status
- Analyzed
- Published
- 14 Jan 2025, last modified 05 Aug 2026 (NVD)
- Severity
- CVSS 3.1 base score 9.8, Critical — computed here from the vector; NVD states 9.8.
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-288 Authentication Bypass Using an Alternate Path or Channel (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 14 Jan 2025; federal remediation due 21 Jan 2025. CISA records known use in ransomware campaigns. CISA entry
- Exploit probability
- EPSS 94.3%, 100th percentile — FIRST, scored 23 Oct 2026. FIRST EPSS
- Vendor
- Fortinet · FortiOS and FortiProxy (CISA)
References on the NVD record
- fortiguard.fortinet.com/psirt/FG-IR-24-535MitigationVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-55591US Government Resource
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.