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.
Key facts
- CVSS score
- 9.8 (v3.1)
- Severity
- CRITICAL
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-288
- EPSS score
- 94.1% (100th percentile)
- In CISA KEV
- Yes, added January 14, 2025
- In EU EUVD
- Yes (EUVD-2024-52819)
- Published
- January 14, 2025
- NVD last modified
- August 5, 2026
- Status
- Analyzed
CISA Known Exploited Vulnerability
Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability
Added to the KEV catalog on January 14, 2025; federal remediation due January 21, 2025. Known to be used in ransomware campaigns.
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2024-52819 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on August 5, 2026.
View on the EU Vulnerability DatabaseAffected products
- fortinet / fortios
- fortinet / fortiproxy
Certified products that may be affected
1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.
- Fortinet, Inc. FortiOS 7.0.7 - Fortinet, Inc. - Common Criteria NSCIB-CC-0590233-CR - active
References
- https://fortiguard.fortinet.com/psirt/FG-IR-24-535(Mitigation, Vendor Advisory)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-55591(US Government Resource)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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