# CVE-2024-55591: Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability

> CVE-2024-55591: Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability. CVSS 9.6 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2024-55591
Last updated: 2026-08-05T05:16:42Z

- Published: 2025-01-14 14:08 UTC · Updated: 2026-08-05 05:16 UTC · Assigner: fortinet
- CVSS: 9.6 (CVSS 3.1) · Severity: Critical · Vector: 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
- EPSS: 94.3%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-01-14, federal due date 2025-01-21, ransomware use: Known
- CWE: CWE-288

## Description

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 required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- Fortinet: FortiOS
- Fortinet: FortiProxy

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2024-55591)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2024-55591)
- [https://fortiguard.fortinet.com/psirt/FG-IR-24-535](https://fortiguard.fortinet.com/psirt/FG-IR-24-535)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2024-55591 · Markdown: https://rewindex.com/cve/CVE-2024-55591.md · JSON: https://rewindex.com/api/v1/cves/CVE-2024-55591 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:02.861Z