CVE-2026-83959

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-03. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

Substance3D - Sampler is affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 8, 2026

References (1)

Vendor Advisories for CVE-2026-83959(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 27× in last 7d / 69× 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. 2026-09-21 10:13 UTCGHSA enrichment
  2. 2026-09-20 21:11 UTCEG score recompute
  3. 2026-09-20 21:11 UTCGHSA enrichment
  4. 2026-09-20 20:16 UTCEPSS rescore
  5. 2026-09-20 08:09 UTCGHSA enrichment
  6. 2026-09-19 18:40 UTCEG score recompute
  7. 2026-09-19 18:40 UTCGHSA enrichment
  8. 2026-09-19 05:37 UTCEG score recompute
  9. 2026-09-19 05:37 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 16:35 UTCGHSA enrichment
  12. 2026-09-18 03:33 UTCEG score recompute
  13. 2026-09-18 03:33 UTCGHSA enrichment
  14. 2026-09-17 19:32 UTCEPSS rescore
  15. 2026-09-17 14:31 UTCGHSA enrichment
  16. 2026-09-17 01:28 UTCEG score recompute
  17. 2026-09-17 01:28 UTCGHSA enrichment
  18. 2026-09-16 14:09 UTCEPSS rescore
  19. 2026-09-16 12:26 UTCEG score recompute
  20. 2026-09-16 12:26 UTCGHSA enrichment
  21. 2026-09-16 05:15 UTCEPSS rescore
  22. 2026-09-15 23:24 UTCGHSA enrichment
  23. 2026-09-15 09:49 UTCEG score recompute
  24. 2026-09-15 09:49 UTCGHSA enrichment
  25. 2026-09-15 03:12 UTCEPSS rescore
Show 44 more
  1. 2026-09-15 03:12 UTCEPSS rescore
  2. 2026-09-14 20:46 UTCGHSA enrichment
  3. 2026-09-14 07:44 UTCGHSA enrichment
  4. 2026-09-13 18:41 UTCEG score recompute
  5. 2026-09-13 18:41 UTCGHSA enrichment
  6. 2026-09-13 05:39 UTCGHSA enrichment
  7. 2026-09-12 16:37 UTCEG score recompute
  8. 2026-09-12 16:37 UTCGHSA enrichment
  9. 2026-09-12 03:35 UTCEG score recompute
  10. 2026-09-12 03:35 UTCGHSA enrichment
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 14:33 UTCEG score recompute
  14. 2026-09-11 14:33 UTCGHSA enrichment
  15. 2026-09-11 01:31 UTCGHSA enrichment
  16. 2026-09-10 12:29 UTCEG score recompute
  17. 2026-09-10 12:29 UTCGHSA enrichment
  18. 2026-09-09 23:27 UTCGHSA enrichment
  19. 2026-09-09 07:20 UTCEG score recompute
  20. 2026-09-09 07:20 UTCGHSA enrichment
  21. 2026-09-08 22:01 UTCEPSS rescore
  22. 2026-09-08 18:17 UTCGHSA enrichment
  23. 2026-09-08 14:19 UTCGHSA enrichment
  24. 2026-09-08 09:59 UTCGHSA enrichment
  25. 2026-09-07 20:36 UTCEG score recompute
  26. 2026-09-07 20:36 UTCGHSA enrichment
  27. 2026-09-07 07:33 UTCGHSA enrichment
  28. 2026-09-06 18:30 UTCEG score recompute
  29. 2026-09-06 18:30 UTCGHSA enrichment
  30. 2026-09-06 13:48 UTCEPSS rescore
  31. 2026-09-06 05:28 UTCGHSA enrichment
  32. 2026-09-05 16:26 UTCEG score recompute
  33. 2026-09-05 16:26 UTCGHSA enrichment
  34. 2026-09-05 15:31 UTCEPSS rescore
  35. 2026-09-05 03:23 UTCGHSA enrichment
  36. 2026-09-04 14:21 UTCEG score recompute
  37. 2026-09-04 14:21 UTCGHSA enrichment
  38. 2026-09-04 13:46 UTCEG score recompute
  39. 2026-09-04 13:46 UTCGHSA enrichment
  40. 2026-09-04 07:42 UTCGHSA enrichment
  41. 2026-09-03 18:40 UTCEG score recompute
  42. 2026-09-03 18:39 UTCGHSA enrichment
  43. 2026-09-03 17:38 UTCEG score recompute
  44. 2026-09-03 17:38 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-83959?
CVE-2026-83959 is a high vulnerability published on September 3, 2026. Substance3D - Sampler is affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
When was CVE-2026-83959 disclosed?
CVE-2026-83959 was first published in the National Vulnerability Database on September 3, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-83959 actively exploited?
CVE-2026-83959 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 92.8% of all scored CVEs.
What is the CVSS score of CVE-2026-83959?
CVE-2026-83959 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-83959?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-83959, 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-2026-83959

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