CVE-2024-55591

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

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

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

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

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

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3