CVE-2026-59835

HIGHPre-NVD 7.78.6
EchelonGraph scoreMEDIUM confidence

“▲” beside the score: it is higher than the CVSS score beside it.

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-07-14. The CNA's CVSS baseline 7.7; sources differ by 0.9.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.7Exploit: None knownExposed services: Not assessed

Upgrade to FortiSandbox version 5.0.3 or above (from the CVE record's solution, Fortinet, Inc.) — apply it.

A exposure of resource to wrong sphere vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.3 through 4.4.8 may allow an unauthenticated attacker to access the VNC server of VMs performing scanning via network requests.

CVSS v3
7.7
EG Score
8.6HIGHmedium confidence
EG Risk
54
EG Risk 54/100

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 (value × EchelonGraph’s weight)
Severity86% × 45%
The EG Score, 8.6 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: Upgrade to FortiSandbox version 5.0.3 or above (from the CVE record's solution, Fortinet, Inc.). Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
31st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

Upgrade to FortiSandbox version 5.0.3 or above (from the CVE record's solution, Fortinet, Inc.). Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 14, 2026

Last Modified

July 16, 2026

Advisory Details (1)

Auto-updated Jul 14, 2026
Fix named in the CVE record's solution (Fortinet, Inc.).
Web page

PSIRT | FortiGuard Labs

https://fortiguard.fortinet.com/psirt/FG-IR-26-145

Vendor Advisories for CVE-2026-59835(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 41× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 235 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 135 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  2. 2026-10-13 15:49 UTCEG score recompute
  3. 2026-10-13 15:48 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-10-12 15:52 UTCEG score recompute
  6. 2026-10-11 19:36 UTCEG score recompute
  7. 2026-10-11 16:51 UTCEG score recompute
  8. 2026-10-11 14:13 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  20. 2026-10-01 13:24 UTCEG score recompute
  21. 2026-10-01 13:24 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  22. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  23. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  24. 2026-09-28 09:21 UTCEG score recompute
  25. 2026-09-28 09:21 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
Show 75 more
  1. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  2. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  4. 2026-09-24 09:53 UTCEG score recompute
  5. 2026-09-24 09:53 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  6. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  7. 2026-09-23 03:56 UTCEG score recompute
  8. 2026-09-23 03:56 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  9. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  10. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  11. 2026-09-18 04:54 UTCEG score recompute
  12. 2026-09-18 04:54 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  13. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  16. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  17. 2026-09-14 10:26 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  18. 2026-09-13 23:28 UTCEG score recompute
  19. 2026-09-13 23:28 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  20. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  21. 2026-09-13 07:54 UTCEG score recompute
  22. 2026-09-13 07:54 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  23. 2026-09-12 13:18 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  24. 2026-09-12 01:46 UTCEG score recompute
  25. 2026-09-12 01:46 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  26. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  27. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  28. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  29. 2026-09-08 01:46 UTCEG score recompute
  30. 2026-09-08 01:46 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  32. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  33. 2026-09-06 13:46 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  34. 2026-09-05 21:18 UTCEG score recompute
  35. 2026-09-05 21:18 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  36. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  37. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  38. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  39. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  40. 2026-08-31 05:42 UTCEG score recompute
  41. 2026-08-31 05:42 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  42. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  43. 2026-08-30 16:21 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  44. 2026-08-30 05:24 UTCEG score recompute
  45. 2026-08-30 05:24 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  46. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  47. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  48. 2026-08-28 02:03 UTCEG score recompute
  49. 2026-08-28 02:02 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  50. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  51. 2026-08-27 13:52 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  52. 2026-08-26 23:55 UTCEG score recompute
  53. 2026-08-26 23:55 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  54. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  55. 2026-08-26 12:49 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  56. 2026-08-26 01:47 UTCEG score recompute
  57. 2026-08-26 01:47 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  58. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  59. 2026-08-25 12:39 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  60. 2026-08-25 01:31 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  61. 2026-08-24 14:43 UTCEG score recompute
  62. 2026-08-24 14:43 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  63. 2026-08-24 03:48 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  64. 2026-08-23 15:11 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  65. 2026-08-23 04:23 UTCEG score recompute
  66. 2026-08-23 04:23 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  67. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  68. 2026-08-22 17:33 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  69. 2026-08-22 06:43 UTCEG score recompute
  70. 2026-08-22 06:43 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  71. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  72. 2026-08-21 19:54 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  73. 2026-08-21 09:05 UTCEG score recompute
  74. 2026-08-21 09:05 UTCGHSA enrichmentGHSA-8fjf-5954-r8w4 · GitHub severity HIGH · GitHub CVSS 8.6
  75. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 38th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59835?
CVE-2026-59835 is a high-severity vulnerability; its CVE record was published on July 14, 2026. A exposure of resource to wrong sphere vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.3 through 4.4.8 may allow an unauthenticated attacker to access the VNC server of VMs performing scanning via network requests.
When was the CVE record for CVE-2026-59835 published?
The CVE record for CVE-2026-59835 was published on July 14, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 16, 2026; the record at its source may have been updated since.
Is CVE-2026-59835 actively exploited?
CVE-2026-59835 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59835?
CVE-2026-59835 has a CVSS base score of 7.7 (the CNA's own assessment, by fortinet; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.6 (HIGH).
How do I remediate CVE-2026-59835?
The CVE record's solution for CVE-2026-59835, written by its CNA Fortinet, Inc., names the fix: "Upgrade to FortiSandbox version 5.0.3 or above". The vendor advisories EchelonGraph has for CVE-2026-59835 are linked in the Vendor Advisories panel on this page.

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