CVE-2024-55591

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-01-14), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Exploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • 4 internet-exposed hosts are running an affected version right now
  • Actively exploited in the wild (CISA-KEV)
  • Linked to ransomware campaigns
CISA-KEV: ExploitedEPSS PROB: 98%CVSS: 9.8Exploit: cisa kev · ssvc active · kev ransomware · epss top5pct · epss high · public exploitExposed: 4

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

Live · internet exposure

4 internet-exposed hosts are running an affected version of CVE-2024-55591 right now.

across 4 countries (Canada, Indonesia, South Africa, United States)top: fortios🔒 ransomware-linked
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
98%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

January 14, 2025

Last Modified

August 5, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-55591
generic

Just a moment

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 45× in last 7d / 201× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 738 total refreshes for this CVE.

  1. 2026-09-19 17:00 UTCGHSA enrichment
  2. 2026-09-19 12:56 UTCGHSA enrichment
  3. 2026-09-19 08:53 UTCGHSA enrichment
  4. 2026-09-19 04:50 UTCGHSA enrichment
  5. 2026-09-19 00:46 UTCGHSA enrichment
  6. 2026-09-18 20:42 UTCGHSA enrichment
  7. 2026-09-18 19:20 UTCCISA KEV update
  8. 2026-09-18 16:38 UTCGHSA enrichment
  9. 2026-09-18 14:15 UTCCISA KEV update
  10. 2026-09-18 12:34 UTCGHSA enrichment
  11. 2026-09-18 08:30 UTCGHSA enrichment
  12. 2026-09-18 04:27 UTCGHSA enrichment
  13. 2026-09-18 00:24 UTCGHSA enrichment
  14. 2026-09-17 20:21 UTCGHSA enrichment
  15. 2026-09-17 16:18 UTCGHSA enrichment
  16. 2026-09-17 12:14 UTCGHSA enrichment
  17. 2026-09-17 08:11 UTCGHSA enrichment
  18. 2026-09-17 04:08 UTCGHSA enrichment
  19. 2026-09-17 00:05 UTCGHSA enrichment
  20. 2026-09-16 20:02 UTCGHSA enrichment
  21. 2026-09-16 15:59 UTCGHSA enrichment
  22. 2026-09-16 14:10 UTCCISA KEV update
  23. 2026-09-16 11:56 UTCGHSA enrichment
  24. 2026-09-16 07:52 UTCGHSA enrichment
  25. 2026-09-16 03:47 UTCGHSA enrichment
Show 75 more
  1. 2026-09-15 23:43 UTCGHSA enrichment
  2. 2026-09-15 19:40 UTCGHSA enrichment
  3. 2026-09-15 15:37 UTCGHSA enrichment
  4. 2026-09-15 11:34 UTCGHSA enrichment
  5. 2026-09-15 07:30 UTCGHSA enrichment
  6. 2026-09-15 03:26 UTCGHSA enrichment
  7. 2026-09-14 23:23 UTCGHSA enrichment
  8. 2026-09-14 19:24 UTCCISA KEV update
  9. 2026-09-14 19:20 UTCGHSA enrichment
  10. 2026-09-14 15:17 UTCGHSA enrichment
  11. 2026-09-14 11:13 UTCGHSA enrichment
  12. 2026-09-14 07:10 UTCGHSA enrichment
  13. 2026-09-14 03:07 UTCGHSA enrichment
  14. 2026-09-13 23:04 UTCGHSA enrichment
  15. 2026-09-13 19:01 UTCGHSA enrichment
  16. 2026-09-13 14:58 UTCGHSA enrichment
  17. 2026-09-13 10:55 UTCGHSA enrichment
  18. 2026-09-13 06:52 UTCGHSA enrichment
  19. 2026-09-13 02:48 UTCGHSA enrichment
  20. 2026-09-12 22:46 UTCGHSA enrichment
  21. 2026-09-12 18:43 UTCGHSA enrichment
  22. 2026-09-12 14:40 UTCGHSA enrichment
  23. 2026-09-12 10:37 UTCGHSA enrichment
  24. 2026-09-12 06:33 UTCGHSA enrichment
  25. 2026-09-12 02:30 UTCGHSA enrichment
  26. 2026-09-11 22:26 UTCGHSA enrichment
  27. 2026-09-11 18:49 UTCCISA KEV update
  28. 2026-09-11 18:22 UTCEG score recompute
  29. 2026-09-11 18:22 UTCGHSA enrichment
  30. 2026-09-11 14:51 UTCEPSS rescore
  31. 2026-09-11 14:18 UTCGHSA enrichment
  32. 2026-09-11 10:14 UTCGHSA enrichment
  33. 2026-09-11 06:11 UTCGHSA enrichment
  34. 2026-09-11 02:08 UTCGHSA enrichment
  35. 2026-09-10 22:05 UTCGHSA enrichment
  36. 2026-09-10 19:28 UTCCISA KEV update
  37. 2026-09-10 18:01 UTCGHSA enrichment
  38. 2026-09-10 13:58 UTCGHSA enrichment
  39. 2026-09-10 09:55 UTCGHSA enrichment
  40. 2026-09-10 05:52 UTCGHSA enrichment
  41. 2026-09-10 01:49 UTCGHSA enrichment
  42. 2026-09-09 21:45 UTCGHSA enrichment
  43. 2026-09-09 19:08 UTCCISA KEV update
  44. 2026-09-09 17:41 UTCGHSA enrichment
  45. 2026-09-09 13:37 UTCGHSA enrichment
  46. 2026-09-09 09:34 UTCGHSA enrichment
  47. 2026-09-09 05:31 UTCGHSA enrichment
  48. 2026-09-09 01:27 UTCGHSA enrichment
  49. 2026-09-08 21:23 UTCGHSA enrichment
  50. 2026-09-08 18:54 UTCCISA KEV update
  51. 2026-09-08 17:20 UTCGHSA enrichment
  52. 2026-09-08 13:16 UTCGHSA enrichment
  53. 2026-09-08 09:12 UTCGHSA enrichment
  54. 2026-09-08 05:07 UTCGHSA enrichment
  55. 2026-09-08 01:01 UTCGHSA enrichment
  56. 2026-09-07 20:58 UTCGHSA enrichment
  57. 2026-09-07 16:55 UTCGHSA enrichment
  58. 2026-09-07 12:51 UTCGHSA enrichment
  59. 2026-09-07 08:43 UTCGHSA enrichment
  60. 2026-09-07 04:39 UTCGHSA enrichment
  61. 2026-09-07 00:36 UTCGHSA enrichment
  62. 2026-09-06 20:33 UTCGHSA enrichment
  63. 2026-09-06 16:30 UTCGHSA enrichment
  64. 2026-09-06 12:26 UTCGHSA enrichment
  65. 2026-09-06 08:23 UTCGHSA enrichment
  66. 2026-09-06 04:20 UTCGHSA enrichment
  67. 2026-09-06 00:17 UTCGHSA enrichment
  68. 2026-09-05 20:14 UTCGHSA enrichment
  69. 2026-09-05 16:10 UTCGHSA enrichment
  70. 2026-09-05 12:08 UTCGHSA enrichment
  71. 2026-09-05 08:02 UTCGHSA enrichment
  72. 2026-09-05 03:59 UTCGHSA enrichment
  73. 2026-09-04 23:56 UTCGHSA enrichment
  74. 2026-09-04 19:52 UTCGHSA enrichment
  75. 2026-09-04 17:38 UTCCISA KEV update

Publicly available exploits

(8 references)

Working exploit code is in the public domain (7 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCUMChacker/CVE-2024-55591-POC
    First seen May 26, 2025
    Open source ↗
  • GitHub PoCexfil0/CVE-2024-55591-POC
    First seen Jan 29, 2025

    A comprehensive all-in-one Python-based Proof of Concept script to discover and exploit a critical authentication bypass vulnerability (CVE-2024-55591) in certain Fortinet devices.

    Open source ↗
  • GitHub PoCwatchtowrlabs/fortios-auth-bypass-poc-CVE-2024-55591
    First seen Jan 27, 2025
    Open source ↗
  • GitHub PoCvirus-or-not/CVE-2024-55591
    First seen Jan 24, 2025

    An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS and FortiProxy may allow a remote attacker to gain super-admin privileges via crafted requests to Node.js websocket module.

    Open source ↗
  • GitHub PoCsysirq/fortios-auth-bypass-exploit-CVE-2024-55591
    First seen Jan 22, 2025
    Open source ↗
  • GitHub PoCsysirq/fortios-auth-bypass-poc-CVE-2024-55591
    First seen Jan 21, 2025
    Open source ↗
  • GitHub PoCwatchtowrlabs/fortios-auth-bypass-check-CVE-2024-55591
    First seen Jan 16, 2025
    Open source ↗
  • Nucleihttp/cves/2024/CVE-2024-55591.yaml
    First seen Jan 1, 2024

    Fortinet - Authentication Bypass

    Open source ↗

Frequently asked(6)

What is CVE-2024-55591?
CVE-2024-55591 is a critical vulnerability published on January 14, 2025. 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…
When was CVE-2024-55591 disclosed?
CVE-2024-55591 was first published in the National Vulnerability Database on January 14, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-55591 actively exploited?
Yes. CISA added CVE-2024-55591 to the Known Exploited Vulnerabilities catalog on January 14, 2025, affecting Fortinet FortiOS and FortiProxy. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2024-55591?
CVE-2024-55591 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2024-55591?
CVE-2024-55591 affects Fortinet FortiOS and FortiProxy. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2024-55591?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-55591, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2024-55591

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