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CVE-2024-55591

critical

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.

From the Tenable Blog

CVE-2024-55591: Fortinet Authentication Bypass Zero-Day Vulnerability Exploited in the Wild
CVE-2024-55591: Fortinet Authentication Bypass Zero-Day Vulnerability Exploited in the Wild

Published: 2025-01-14

Fortinet patched a zero day authentication bypass vulnerability in FortiOS and FortiProxy that has been actively exploited in the wild as a zero-day since November 2024.

References

https://www.bleepingcomputer.com/news/security/critical-fortiswitch-flaw-lets-hackers-change-admin-passwords-remotely/

https://thehackernews.com/2025/03/vanhelsing-raas-launch-3-victims-5k.html

https://www.darkreading.com/cyberattacks-data-breaches/critical-fortinet-vulnerability-draws-fresh-attention

https://securityaffairs.com/175583/security/u-s-cisa-adds-fortinet-fortios-fortiproxy-and-github-action-flaws-to-its-known-exploited-vulnerabilities-catalog.html

https://therecord.media/mora001-ransomware-gang-exploiting-vulnerability-lockbit

https://www.theregister.com/2025/03/14/ransomware_gang_lockbit_ties/

https://www.darkreading.com/cyberattacks-data-breaches/actor-tied-lockbit-ransomware-targets-fortinet-users

https://www.bleepingcomputer.com/news/security/new-superblack-ransomware-exploits-fortinet-auth-bypass-flaws/

https://www.forescout.com/blog/new-ransomware-operator-exploits-fortinet-vulnerability-duo/

https://www.securityweek.com/ivanti-fortinet-patch-remote-code-execution-vulnerabilities/

https://www.bleepingcomputer.com/news/security/fortinet-warns-of-new-zero-day-exploited-to-hijack-firewalls/

https://www.bleepingcomputer.com/news/security/fortinet-discloses-second-firewall-auth-bypass-patched-in-january/

https://www.darkreading.com/cloud-security/actively-exploited-fortinet-zero-day-attackers-super-admin-privileges

https://www.theregister.com/2025/01/21/fortinet_firewalls_still_vulnerable/

https://www.securityweek.com/fortinet-confirms-new-zero-day-exploitation/

https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/cve-2024-55591-fortinet-fortios-fortiproxy-zero-day/

https://www.bleepingcomputer.com/news/security/fortinet-warns-of-auth-bypass-zero-day-exploited-to-hijack-firewalls/

https://thehackernews.com/2025/02/ivanti-patches-critical-flaws-in.html

https://www.tenable.com/blog/cve-2024-55591-fortinet-authentication-bypass-zero-day-vulnerability-exploited-in-the-wild

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

Details

Source: Mitre, NVD

Published: 2025-01-14

Updated: 2025-01-23

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.92998

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest