CISA KEV · Known exploitedCritical

CVE-2024-55591

Fortinet FortiOS, FortiProxy, fortiproxy

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.

CVSS
9.8
EPSS
98.3%
99.9% percentile
CISA KEV
Listed
Published
2025.01.14
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability98.3%
Technical severityCVSS 9.8

Vulnerability overview

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.

Affected product and versions

Product
Fortinet FortiOS, FortiProxy, fortiproxy
Affected versions
7.0.0, 7.2.0, >= 7.0.0 < 7.0.20, >= 7.2.0 < 7.2.13, >= 7.0.0 < 7.0.17
Fixed versions
7.0.20, 7.2.13, 7.0.17

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

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

Due date: 2025.01.21
  1. 1
    Identify

    Confirm that Fortinet FortiOS, FortiProxy, fortiproxy and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-288
KEV added
2025.01.14
Ransomware use
확인됨
CVE-2024-55591 — Fortinet FortiOS, FortiProxy, fortiproxy | SECUFOCUS NOW