Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

CVSS v3.1 Metrics

CRITICAL

9.6 / 10

Minimal Risk Critical

Vector Specification

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

Exploitation Likelihood

EPSS Prediction

94.11 %

Predictive Probability

Percentile Rank

99.9 th

Documented as more likely to be exploited than 99.9% of known CVEs.

Detection Date

Jan 14, 2025

Remediation Due

Jan 21, 2025

CISA Catalog Active

Threat Analysis

Fortinet FortiOS and FortiProxy contain an authentication bypass vulnerability that may allow an unauthenticated, remote attacker to gain super-admin privileges via crafted requests to Node.js websocket module.

Remediation Directive

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

Asset Context

Vendor Identity

Fortinet

Affected Product

FortiOS and FortiProxy

Ransomware Status

Campaign Use Known

Weakness Classification

CWE-288

External Intelligence

https://fortiguard.fortinet.com/psirt/FG-IR-24-535

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2024-55591