Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability
Fortinet — FortiOS
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.
9.6
98.3%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C
- Published
- Jan 14, 2025
- Modified
- Jul 8, 2026
- Added to KEV
- Jan 14, 2025
- Federal patch due
- Jan 21, 2025
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2024-55591, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2024-55591 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2024-55591?
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.
How severe is CVE-2024-55591?
CVE-2024-55591 has a CVSS base score of 9.6 out of 10 (CVSS 3.1).
Is CVE-2024-55591 actively exploited in the wild?
Yes. CVE-2024-55591 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jan 14, 2025, meaning CISA has confirmed evidence of active exploitation. It is also flagged as used in ransomware campaigns.
What is the EPSS score for CVE-2024-55591?
98.3% - meaning FIRST.org's EPSS model estimates a 98.3% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2024-55591?
Yes - a public Nuclei template referencing CVE-2024-55591 exist in public repositories we checked.
What type of vulnerability is CVE-2024-55591?
CVE-2024-55591 is classified under CWE-288 (Execute unauthorized code or commands).
Cross-checked against
Impactr finds and proves whether CVE-2024-55591 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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