CVE-2026-24858

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-01-27), indicating real-world exploitation has been confirmed by US federal agencies. a secondary CVSS source baseline 9.8 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, secondary
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • 5 internet-exposed hosts are running an affected version right now
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 86%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 5

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] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiNAC-F 7.6.3 through 7.6.5, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.

Live · internet exposure

5 internet-exposed hosts are running an affected version of CVE-2026-24858 right now.

across 5 countries (Canada, Indonesia, South Africa, Sweden, United States)top: fortios
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
86%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

January 27, 2026

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Sep 14, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
generic

Analysis of Single Sign-On Abuse on FortiOS | Fortinet Blog

https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios
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-2026-24858
generic

SSA-975644

https://cert-portal.siemens.com/productcert/html/ssa-975644.html
generic

Just a moment

https://fortiguard.fortinet.com/psirt/FG-IR-26-060

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 49× in last 7d / 220× 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 845 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCabsholi7ly/CVE-2026-24858-FortiCloud-SSO-Authentication-Bypass
    First seen Jan 30, 2026

    CVE-2026-24858 FortiCloud Single Sign On (SSO) a factory default enabled feature once you register any FortiGate/FortiManager/FortiAnalyzer contains a critical authentication bypass flaw.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2026-24858?
CVE-2026-24858 is a critical vulnerability published on January 27, 2026. An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager…
When was CVE-2026-24858 disclosed?
CVE-2026-24858 was first published in the National Vulnerability Database on January 27, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-24858 actively exploited?
Yes. CISA added CVE-2026-24858 to the Known Exploited Vulnerabilities catalog on January 27, 2026, affecting Fortinet Multiple Products. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-24858?
CVE-2026-24858 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2026-24858?
CVE-2026-24858 affects Fortinet Multiple Products. 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-2026-24858?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-24858, 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-2026-24858

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