CVE-2026-9259

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 91% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Improper validation of server certificates in Canon EOS Network Setting Tool Version 1.5.0 or earlier

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

June 16, 2026

Last Modified

June 18, 2026

Advisory Details (1)

Auto-updated Sep 13, 2026
No patch confirmed yet.
generic

「EOS Network Setting Tool」に関する脆弱性について｜サポート｜キヤノン

https://canon.jp/support/support-info/260615vulnerability-response

Vendor Advisories for CVE-2026-9259(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 10× in last 7d / 57× 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 284 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9259?
CVE-2026-9259 is a critical vulnerability published on June 16, 2026. Improper validation of server certificates in Canon EOS Network Setting Tool Version 1.5.0 or earlier
When was CVE-2026-9259 disclosed?
CVE-2026-9259 was first published in the National Vulnerability Database on June 16, 2026, with the most recent update on June 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9259 actively exploited?
CVE-2026-9259 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.6% of all scored CVEs.
What is the CVSS score of CVE-2026-9259?
CVE-2026-9259 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-9259?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9259, 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.

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