{"id":"CVE-2024-55591","kind":"vulnerability","aliases":["CVE-2024-55591"],"related":[],"title":"An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS version 7.0.0…","description":"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.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Fortinet FortiOS and FortiProxy contain an authentication bypass in the Node.js websocket module that lets an unauthenticated remote attacker gain super-admin privileges. CISA lists it as exploited in the wild and tied to ransomware campaigns.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2025-01-14T00:00:00+00:00","products":[{"name":"Fortinet FortiOS and FortiProxy","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"fortinet fortiproxy","fixed":["7.0.20"],"affected":">= 7.0.0, < 7.0.20","ecosystem":"vendor"},{"name":"fortinet fortiproxy","fixed":["7.2.13"],"affected":">= 7.2.0, < 7.2.13","ecosystem":"vendor"},{"name":"fortinet fortios","fixed":["7.0.17"],"affected":">= 7.0.0, < 7.0.17","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","firewall","fortinet","fortios","fortiproxy","infrastructure","ransomware","vpn"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the vendor mitigations per Fortinet's advisory; the sources do not name fixed versions. If no mitigation is available, discontinue use of the product per CISA.","status":"open","published_at":"2025-01-14T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:52:40+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-10-23T20:52:40Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor mitigations per Fortinet's advisory; the sources do not name fixed versions. If no mitigation is available, discontinue use of the product per CISA.","reach":"internet","impact":"high","summary":"Fortinet FortiOS and FortiProxy contain an authentication bypass in the Node.js websocket module that lets an unauthenticated remote attacker gain super-admin privileges. CISA lists it as exploited in the wild and tied to ransomware campaigns.","category":"infrastructure","who_cares":["fortinet","fortios","fortiproxy","firewall","vpn"],"confidence":0.7,"needs_auth":"no","worst_case":"Unauthenticated attacker becomes super-admin on the firewall or proxy appliance.","analyst_note":"Pull Fortinet's PSIRT advisory for affected and fixed versions, the exact mitigation steps, and IOCs/log checks for websocket-based admin access; sources here give none of these.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000472,"input_tokens":2675,"output_tokens":409,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2024':18A,21A '-288':12A '-55591':19A,22A '7.0.0':16A 'action':109C 'admin':63B,98C 'affect':13A 'allow':89C 'altern':6A 'and':25A 'appli':110C 'attack':59B,93C 'authent':2A,47B,84C 'bypass':3A,48B,85C 'campaign':77B 'channel':9A 'cisa':65B,107C 'contain':45B,82C 'craft':101C 'cve':17A,20A 'cwe':11A 'discontinu':116C 'exploit':33B,69B 'firewal':34B 'fortinet':23A,27A,29A,31A,35B,41B,78C 'fortio':14A,36B,42B,79C 'fortios':24A,32A 'fortiproxi':37B,44B,81C 'fortiproxy':26A,28A,30A 'gain':60B,95C 'infrastructur':38B 'instruct':114C 'let':55B 'list':66B 'may':88C 'mitig':111C,122C 'modul':53B,106C 'node.js':51B,104C 'path':7A 'per':112C 'privileg':64B,99C 'product':120C 'ransomwar':39B,76B 'remot':58B,92C 'request':102C 'requir':108C 'super':62B,97C 'super-admin':61B,96C 'tie':74B 'unauthent':57B,91C 'unavail':124C 'use':4A,117C 'vendor':113C 'version':15A 'via':100C 'vpn':40B 'vulner':10A,86C 'websocket':52B,105C 'wild':72B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2025-01-14T00:00:00+00:00","kev":{"dateAdded":"2025-01-14","dueDate":"2025-01-21","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Known"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"psirt@fortinet.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2024-55591","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-55591","severity":null,"published_at":"2025-01-14T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T15:39:40+00:00","note":null},{"source":"nvd","external_id":"CVE-2024-55591","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-55591","severity":null,"published_at":"2025-01-14T14:15:34+00:00","modified_at":"2026-08-05T05:16:42+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}