CVE-2026-9259

CRITICALNVD 9.86.5▼
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-16. NVD baseline CVSS 9.8; sources differ by 3.3.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 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
6.5(medium)
EPSS
9.4%
KEV
Not listed

Published

June 16, 2026

Last Modified

June 18, 2026

Advisory Details (1)

Auto-updated Jun 29, 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 21× in last 7d / 65× 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.

  1. 2026-07-06 23:30 UTCEG score recompute
  2. 2026-07-06 23:30 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 19:13 UTCEG score recompute
  6. 2026-07-05 19:13 UTCGHSA enrichment
  7. 2026-07-05 02:31 UTCEPSS rescore
  8. 2026-07-04 18:40 UTCEG score recompute
  9. 2026-07-04 18:40 UTCGHSA enrichment
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-03 15:49 UTCEG score recompute
  13. 2026-07-03 15:49 UTCGHSA enrichment
  14. 2026-07-02 15:16 UTCEG score recompute
  15. 2026-07-02 15:16 UTCGHSA enrichment
  16. 2026-07-01 15:07 UTCEPSS rescore
  17. 2026-07-01 14:42 UTCEG score recompute
  18. 2026-07-01 14:42 UTCGHSA enrichment
  19. 2026-06-30 23:22 UTCEPSS rescore
  20. 2026-06-30 14:07 UTCEG score recompute
  21. 2026-06-30 14:06 UTCGHSA enrichment
  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-29 13:32 UTCEG score recompute
  24. 2026-06-29 13:32 UTCGHSA enrichment
  25. 2026-06-28 14:07 UTCEPSS rescore
Show 40 more
  1. 2026-06-28 12:58 UTCEG score recompute
  2. 2026-06-28 12:58 UTCGHSA enrichment
  3. 2026-06-28 04:56 UTCEPSS rescore
  4. 2026-06-27 12:25 UTCEG score recompute
  5. 2026-06-27 12:25 UTCGHSA enrichment
  6. 2026-06-27 03:08 UTCEPSS rescore
  7. 2026-06-26 11:52 UTCEG score recompute
  8. 2026-06-26 11:52 UTCGHSA enrichment
  9. 2026-06-25 13:50 UTCEPSS rescore
  10. 2026-06-25 07:03 UTCEG score recompute
  11. 2026-06-25 07:03 UTCGHSA enrichment
  12. 2026-06-24 14:05 UTCEPSS rescore
  13. 2026-06-24 06:30 UTCEG score recompute
  14. 2026-06-24 06:30 UTCGHSA enrichment
  15. 2026-06-23 21:33 UTCEPSS rescore
  16. 2026-06-23 04:50 UTCEG score recompute
  17. 2026-06-23 04:50 UTCGHSA enrichment
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 04:13 UTCEG score recompute
  20. 2026-06-22 04:13 UTCGHSA enrichment
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 03:39 UTCEG score recompute
  23. 2026-06-21 03:39 UTCGHSA enrichment
  24. 2026-06-21 01:59 UTCEPSS rescore
  25. 2026-06-20 03:03 UTCEG score recompute
  26. 2026-06-20 03:03 UTCGHSA enrichment
  27. 2026-06-19 19:26 UTCEPSS rescore
  28. 2026-06-19 02:23 UTCEG score recompute
  29. 2026-06-19 02:23 UTCGHSA enrichment
  30. 2026-06-18 17:52 UTCEPSS rescore
  31. 2026-06-18 17:22 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  32. 2026-06-18 01:50 UTCEG score recompute
  33. 2026-06-18 01:50 UTCGHSA enrichment
  34. 2026-06-17 17:53 UTCEPSS rescore
  35. 2026-06-17 01:17 UTCEG score recompute
  36. 2026-06-17 01:17 UTCGHSA enrichment
  37. 2026-06-16 17:53 UTCEPSS rescore
  38. 2026-06-16 15:47 UTCNVD updateCVSS v4 → 7.1 · severity → MEDIUM
  39. 2026-06-16 00:44 UTCEG score recompute
  40. 2026-06-16 00:44 UTCGHSA enrichment

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 9.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9259?
CVE-2026-9259 has a CVSS v3 base score of 9.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.5.
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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-9259

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