CVE-2024-55591

9.8 criticalKEVEPSS 94%

Critical (9.8) in Fortinet FortiOS and FortiProxy. In CISA KEV since 2025-01-14, with known ransomware use. EPSS 94% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 94% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CISA KEV: listed 2025-01-14, due 2025-01-21, known ransomware use
CWE: CWE-288
Published: 2025-01-14
Modified: 2026-08-05
Record from: the NVD, synced 2026-10-19

Affected

fortinet:fortios
fortinet:fortiproxy

References

https://fortiguard.fortinet.com/psirt/FG-IR-24-535
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-55591

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